Can I get all of my Components into a HTPC/SFF Case?

[RussZS]

Here is my current spec, sitting in an Antec 900:

Corsair HX620 PSU
nVidia 8800GTS 512MB
Intel E6600 C2D
Asus P5B Vista Edition
Geil 1GB Ram Sticks x 4
320GB Seagate 7200.11
500GB WD HDD *forget model - 32MB Cache
Creative X-Fi Xtreme Music

I need to make some space, so a smaller case is needed. I see most small cases seem to require mATX mobo's, but I have seen this one:

http://www.overclockers.co.uk/showp...stone Lascala LC13B HTPC Case - Black (No PSU)

Will that be suitable? Any issues with the double slot graphics card?

Thanks,

Russ.