Both are too much money if you ask me. And those CPUs are only 2.4GHz, not 9.6. If thats how the company advertised the speed, I wouldn't trust buying a PC from them since they know nothing about how multiple cores operate.
LiteOn doesn't list that DVD drive as Vista compatible. I haven't been able to find a 9.1 channel sound card, I'd be curious to know what board they're using and what chipsets. (Asus brand from the listed EPU)
With this custom built system, you get 8GB ram, 1TB harddrive, a dedicated sound card, and 2 9800GT cards, which should solve the problem of getting either one 9800 or two 9600s. Overall, the system looks better in my opinion is about $500 cheaper before shipping. And most hardware carries a typical 1-3 year warranty.
CPU Q6600 - $182.45
OCZ Gold 8GB DD2 800 - $119.99
WD 1TB Sata2 (16mb cache) - $114.99
XFX GeForce 9800 GT 512MB - $99.99 (2)
LG GH20NS15 DVD burner - $23.99
Thermaltake Soprano RS101 /w side window - $49.99
SeaSonic S12 SS-550HT 550w - $89.99
Creative X-Fi Xtreme 7.1 PCI-Express - $59.99
AOC 22" LCD - $219.99
MS Vista Home Premium - $222.99
Asus P5N-D (750i,EPU,gigabit LAN) - $139.99
TOTAL: $1,424.34
Add $110 for the Asus P5N-T if you want the 780i chipset instead.