Wow, an AGP8x card taht's 13.5 inches long... talk about a compatibility headache.
P183 would fit that card, but it's about $160 so you might not want to go that high.
Antec Nine Hundred Black Steel ATX Mid Tower Computer Case (Maximum video card size: 16"/406mm (Note: some video cards may require removal of the adjacent hard drive cage)
I know Lian Li and NZXT have cases to fit that as well, but I'm not sure which ones and I couldn't find one less than $99 at any rate.
I'd recommend this power supply for the budget builder in your power range.
CORSAIR Builder Series CX430 CMPSU-430CX 430W ATX12V Active PFC Power Supply
$25 (after mail in rebate) http://www.newegg.com/Product/Product.aspx?Item=N82E16817139017