Case VS Spec*

hi,
if there is anyone who could help me narrow down which case/cases would be appropriate to house this specification (+ any future upgrades/x2 GFX card etc.) I've been looking at cases from antec (the 190) and thermaltake's range but i'm not quite sure what to choose.

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SPEC___*****

Motherboard
Gigabyte GA-N680SLI-DQ6

Processor
1 x Core 2 Extreme Quad-core 2.66GHz

RAM
2 x 2GB DDR2 RAM (“OCZ” 4GB Performance Gold Edition Package)

Graphics
GeForce 768MB 8800GTX
(future upgrade to +GeForce 768MB 8800GTX)

Considered case
Antec Performance One P182

Considered PSU
1KW ++

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if you could help me out i'd really appreciate it. Thanks!