Are you looking for an appliance PC or a homebuilt?
Some thoughts:
In the DVD/CD area, you can choose between a "combo" drive, that is a CD
burner with the ability to read DVDs. DVD burners are getting to be cheap
enough that I'd recommend going for one of those, as they can read and write
DVDs and CDs. The main question is to whether to get a drive that supports
dual-layer DVD+R. (Dual layer gives over 8 GB.) Incidentally, 8X DVD burning
gives a data rate of around 11 MB/s, equivalent to roughly a 73X CD burner.
Onboard sound is probably OK at this time. I think that my Audigy 2 card
gives better sound than the onboard sound on my Asus P4P800 board, but the
onboard sound isn't bad.
Avoid onboard video if he wants to play any 3D games.
I believe that SATA drives don't offer much performance gains over parallel
ATA (IDE) drives at the moment, unless you're prepared to pay for 10,000 RPM
Western Digital Raptor drives (36 or 74 GB). (I'm using a couple of SATA WD
160 GB drives in RAID 0, but I doubt that there's much advantage for most
purposes.)
If his monitor is as old as a PI machine, it's probably a low-resolution
piece of junk by current standards. Monitors are much cheaper than they were
a few years ago, so you might wish to shop for a new one.
For a build-it-yourself system, here's a relatively high-end system (For
$1700US):
http://www.extremetech.com/article2/0,1558,1644411,00.asp
"Build the Most PC for Your Money"
Some might argue for other pieces, but nothing here is bad.
For a real cheapie,
http://www.extremetech.com/article2/0,1558,1585316,00.asp
"Build It: A Web-Surfing PC for $500 "
If you have $1000 to spend, want an appliance PC, and insist on Intel
hardware, I suggest a Dell Dimension 8400 (
www.dell.com). It uses all the
latest (Intel) hardware (Socket T CPU, PCI Express video, SATA drive, etc.)
If it's to be used for serious gaming, I suggest switching to the 19" CRT
monitor. Going to 1 GB of RAM would add $100, and might be worthwhile. The
graphics card upgrade may be worthwhile for gaming. This system is
relatively future-proof: it may not be obsolete for 3 months or so.
(Disclaimer: I have a close relative who works for Dell. I own no Dell
hardware, or Dell stock, though.)
Have fun.
Bob Knowlden
Address may be scrambled. Replace nkbob with bobkn.