I'm a cost savings kinda guy, so I would get rid of the remote control car with the P4 setup and save the $12.
On a serious note, I'd probably do a little price shopping some more. I usually start at pricewatch.com and go from there.
Some comments about each setup.
Case - Both setups have the same case. I recently put together a new system myself and got a bit better PS for less money. $33.65 10-Bay Black ATX Window Case w/400W Power Supply. (computergeeks.com) Sure it's not an aluminum case, but I haven't heard an argument that states the aluminum case is any better.
Memory
Intel Side
Kingston is a well known ram mfg, not terribly bad on price, but I have seen the same (not Kingston) for $29 plus shipping. Depends on how many places you want to piece together from and if the cost savings is worth it. Since Kingston is so well known, that isn't a bad price at all.
AMD Side
I'd stick with the Kingston.
Motherboard
Intel Side
A near perfect choice. One thing high on my personal priority list is RAID-1 (Mirror) I am a poor backer upper, so since the technology is there to let the system do my backup for me, I much prefer that. This motherboard at least what I read at your linked page says it'll do Raid-0 but doesn't mention Raid-1. Sounds like there's only the two IDE channels, which I prefer the 4 channel, two raid and two non-raid. Again, refering to the system I just put together, this is the first time in my life that I have 5 IDE devices setup in a PC and all working and still have 3 open 2 RAID and 1 non-raid. BTW-I only paid $29 plus shipping for that board, but it is also socket 423 and RDRAM.
🙁 If you can afford the more expensive boards, I've seen good raid boards for around $160.
AMD Side:
Only thing I can say about the AMD setup is no RAID, but other than that, the factor is right on target.
CPU
It's really tit for tat there. I am no longer partial toward either company, and they both seem to be comparable, the AMD is a bit cheaper (as AMD's always have been)
I see nothing on other devices, so I'll just comment that I am partial toward Western Digital on hard drives, just because they've proven to have better than average customer service. I would also put in at least ATA-100 drives if you do decide to go raid. The most common Integrated raid controllers can't handle anything below that. Well, at least the one I got on my board anyhow.
If your interested in seeing the setup I just purchased you can <a href="http://forumz.tomshardware.com/community/modules.php?name=Forums&file=viewtopic&p=31440#31440" target="_new">read it here.</A>
I'm not sure that the html is going to work right, it doesn't on the preview, so you'll may have to find it in the Poll section under opinions and experiences (I think.)
Take Care,
RJ