Perhaps I should have said smaller, as well. There is a significant size difference between the two systems.
The Antec case is 2808 cubic inches. The CasEdge is 1617 ci. The Antec weighs 28 lbs shipped. The CasEdge is 17.5 lbs.
Perhaps I didn't make this clear, but my primary motivating with the mATX system was size. Everything else was secondary.
As for 19" vs. 17", you're right, they surf the web and do casual gaming. I don't think Joe user is going to need the extra 2" - That's 50's call, and I was simply offering an alternative. Don't take it personally.
Point by point, though.
nForce chipset. Show me a mATX nForce2 chipset board with SATA, and I'd be all over it. They're not out there, and if they are, I've overlooked it. As for its speed versus the KM400A boards, we're not talking lightyears ahead. I'd be surprised if the difference is greater than half a percent in most tests. Dual-channel's only advantage on the Athlon platform comes when you're using onboard video, and obviously we're not, so I don't see much value with the nForce2's.
Passive video card? Okay, we'll switch back. I was offering one way to redistribute the money saved by going to the 17" LCD. We'll put that into something else then. Silent case? It's only silent because it sports 120mm fans and has a PSU fan that moves all of 25 CFM of air. The CasEdge with a Silverstone would likely have the same combined dB ratings with the Silverstone 120mm fan and the CasEdge stock 80mm exhaust fan. WD drives may be a bit louder, but with 8MB of cache, it will be faster than that Samsung. Again, it's going to come down to preference of quietness vs. speed. I give a slight preference to speed when the difference between the two is so small, and in this case, both the speed and noise differences are not all that great. You obviously favor noise levels over speed, again, your perogative; nothing wrong with personal preference.
And this CPU cooler is not louder. The stock fan simply doesn't auto-adjust speed with ambient temp; the top speeds and dB levels of the Arctic and the Speeze are identical. So we throw a temp-sensing fan on the Speeze. Then you've got the same noise levels, but an all-copper heatsink with a greater density of fins which have a higher thermal conductivity. You do the math.
Call the DVI absence a slip-up. I glossed over that. So we'll throw in that Sony. Awesome contrast ratio and viewing angle on that sucker. An excellent choice.
Yes, SATA will require a floppy to install. I'm sure he can handle hooking up a drive temporarily, or he can get a black floppy for all of a few dollars.
BTW - You left the HSF off your last list. If he's now stuck to using the stock Athlon HSF, you just lost any edge that Hard drive bought ya, and more.
So let's go over my altered list.
$455
Sony 17" LCD - 16ms refresh, 160 degree viewing, 500:1 contrast, DVI
$80
XP Barton retail
$65
MSI KM4AM-L
$94
Radeon 9600 128-bit passive
$67
80GB Seagate 7200 RPM 8MB Cache SATA
$49
Lite-On SOHC-5232K w/ Nero Express, PowerDVD
$17.50
Speeze copper heatsink/80mm fan
$18
Thermaltake 90mm fan with 90 to 80mm adapter - 27 CFM @ 17 dB up to 82 CFM @ 47 dB - Temperature or manual control
$47
CasEdge mATX case
$41
SilverStone 360W PS with 120mm exhaust
$11
Black floppy drive
$7
Round single-device IDE cable for CD-RW drive
$7
Round floppy cable
$24
Chaintech AV710 7.1 Channel Soundcard w/ Optical Out
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$983 (all prices include shipping)
Okay, so, to sum that one up. You've got SATA. Better audio. You've got a silent HSF combo that is overclockable. A near-silent PSU and near-silent exhaust fan, same as the Antec. You've got a floppy drive for legacy support and loading your SATA drivers, and a CD-RW that actually comes with decent burning and DVD playback software. All your cables are rounded for the best airflow. *And*, to top it off, it's a lot smaller than the ATX sized system.
You lose about 33% on the video card for speed versus the 9600XT, you lose a bit of quietness with the HD, but you gain that back with everything else.
But again - This system caters to a different purpose than Tostada's. If size is not a factor, go large. It all comes back to the basics of computing.
Price = (Velocity + Features)/(Size + Noise)
As size and noise increase, price decreases. As speed and featureset expand, price increases. It's sacrifices and trade-offs, and only the person putting it together in the end can make the decision where the corner needs to be cut to make that price point.