Consider getting a DVD/ATA-66 Drive comes to mind then putting it on one of the other busses, cheaper than getting a SCSI CDRW and card(although its the obvious solution- and yes, SCSI does whip the lamas ass), its all down to money, you could put the 20g swap on SCSI too or instead which would make sense as a swap disk(wait a minute, can you do that with raid, sorry no experince building raid systems. Ill speak to a friend of mine who specialises in _very_ expensive pro video editing systems ($100,000+) about how to set that all up).. I assume you've bought the hardware so.....consider this:
imho (and correct me if i'm wrong but..) the RPM of the drive has a far larger impact on speed than the IDE transfer rate (ATA-33/66/100 etc) so why not put the CD on the same channel as the swap, least you'll still be able to burn cd-to-cd. Even most games now do not use the CD drive much during play so apart from adding a few minutes on your instal times for big software it will have little effect in the end.
SB Lives value are great cards...but....(and here ill justify my opinion of asus too) I've built a few machines wiht the origional asus A7V's and when you put a live in those as wel as another PCI card they seem to nick the IRQ of the PS/2 mouse causing windows to hang on boot, i fixed this by removing the DOS emulation drivers which grab an IRQ on boot, locking the IRQ of the PCi slot dosen't have any effect.
The other problem is with the Promise IDE controller (which is not really asus's fault but...). The only way i've seen this running stably on an A7V was to overclock it, even then you still got random hangs that forced you to reboot. I've never been able to use it properly myself, a waste considering i've got 4 IDE buses and can only use 2, and force my segateATA-100 drive to run at 66.
The DDR boards from asus seem to vary, some people have gone though hell with them others have been fine, seems to come down to batch and place of purchase. If you get it runnign fine chances are you'll have a great board that will last, i just have had a signifigant number of bad experiences with the recently and am using either MSI or Elite boards. That particular comment was because i'd jsut got a phone call from a friend who recently built a 1.3 on the same board which had just died - not good. (also turned out to have more to do with the 250W PSU, and shitlaods of powersucking hardware but....)
Cooling....all comes down to how much $ you want to spend and how far you want to go, yea you need a 'desktop' case to really use those heatsinks but take a look @
Toms Hardware and see the difference, it can be worth it, particualry in summer/when you want to overclock.
Have you bought all this or not(obviously you have part of it but..)? If not consider investing in a aliminium case, well worth the money cooling wise.
As i said below grounding isin't as big as some people seem to think it is, i've seen people workin on nylon carpets wihtout straps in porfessional places wihtout a problem, it comes down to how handle the hardware, and what bits you touch too.
Rounded cables aren't worth the fuss, just contain and remove the head around your motherboard and you shouln't have a problem. If you do want to i advise you do it in blocks of 5 insidivual threads, cut a tiny bit at the end then rip, its far safer than cutting the whole way.