I would agree that laptop users buy things every 3 years or so. But then, like I said, I buy cheap stuff. Replacing is not a problem.
It is if the 4-pin FireWire port in your Dell Inspiron motherboard shorts out in the middle of recording a bad ass arpeggiated synthesizer riff, isn't it?
If you're recording music, I guarantee you don't need more than what budget Intel chips offer.
The Intel Celeron series sucked ass at recording/procssing/remixing tracks.
That's why I only bought chips for my DAWs.
No limited front side bus like budget Intel chips, and at a reasonable price.
Nor do you need more than the typical terabyte of harddrive space they offer (and if you do, external drives cost nothing too).
The storage capacity of the hard drive is but only one factor of a hard drive's ability to serve as a repository for sample material and storage space for a DAW.
Unfortunately, STORAGE SIZE has NOTHING to do with the hard drive's ABILITY to RECORD AUDIO IN REAL TIME WITHOUT SKIPPING/ADDING UNDESIRABLE AUDIO ARTIFACTS.
The drive specification most important for someone building a DAW on a budget is to get a an internal hard drive that has a drive speed of at least 7,200 RPM - because that is the drive speed that is the fold standard for home recording.
Hard drives with a drive speed of 5,400 RPM will not be able to keep up with recording multiple tracks + playback from an audio/MIDI sequencer without glitching out.
So, let's not confuse STORAGE with DRIVE SPEED.
Nor do you need more than the 4gigs of ram they have.
That depends on the operating system you are using. a 32-bit OS like Windows XP-SP3, or Vista 32-bit, can only handle up to 3.25 GB of RAM because that is the upper limit of distinct memory locations that the OS can assign data to and have available in real time.
Now, if you have a 64-bit operating system, and you have 16 gigabytes of RAM, will you not feel more comfortable knowing that your DAW can handle in real time 16 gigabytes of information that are instantly available WITYHOUT having to resort to disk-streaming to the hard disk to keep sample memory from overflowing?
Do you need it? Maybe not.
But, in this day and age, if you buy a 32-bit OS and limit yourself to 32-bit applications, then you are wasting your money, and boxing yourself in as more and more newer products will require the support of a 64-bit OS and minimum amount of RAM (8 to 16 GB) in order to function.
There was a time when this stuff was at a premium, but it's cheap shit now. The only reason one needs the highest end computer for music recording is for a serious studio setup and you want to control 64 tracks of the London Philaharmonic in real time.
In many cases, yes, I agree with you, but for the hobbyist who simply wantsto push the envelope, or have room to grow, or even just have a "buffer" of safety between his system's maximum capacity and that of the track he/she is trying to record, I feel those reasons are valid also.
A laptop with a typical usb interface (from protools, cubase suppliers, m-audio, whoever) does the job mighty fine. The computer is the least you should worry about with music. Save your money for good music software. That's what gets expensive. If you use cubase or protools, they already come with a lot, but they have a lot of plug-ins you might want to get. And some get pricey.
Here's where I'll throw a curve ball. I use Mackie's Trackton 3.
It is one of the least expensive audio/MIDI sequncers available, and it is easy to use and fully funtioning.
I also use a lot of FREE VSTs (See the KVR site).
Plus, IK use my college student discount to buy one or two good VSTs per year.
By recording my own "real" instruments" and using "real vocals" from friends I am able to create a diverse soundscape with very little investment.
Creativity goes farther than raw capital, in my world.
Alex gives good advice, but he's Se dominant, and gonna tell you to get the best of the best.
LOL! You give good advice too, KDude. Please don't think I was bashing your commentary; I was merely playing devil's advocate.

Don't EVER be too quick to dscount me just because I am a Se dom.

I have over a 1,000 posts at
www.teakheadz.com, and have been playing guitar, playing my Access Virus KC virtual analog synthesizer, setting up live sound rigs, and working as an engineer and DJ at local night clubs for many years.
I've read countless resources, spend days of my life at Guitar Center, and spent more money on gear than I care to admit, but I don't regret any of it, because I learned what I set out to do, and even more, and in the end, I can make a professional sounding recording environment with bare minimum equipment and proper room setup and mic technique than what many wanna' be "Producers" shovel out of their shit hole studios that cost them hundreds of thousands of dollars.
I'm not the top dog in this realm of expertise, but I know my shit, and I can back it up.
-Alex