Do I need a case with 8 expansion slots to use 3 way SLI on aASUS P6X58D-E?n

^ 3-Way SLI ? Which card ?
How about this case ? Has 8 Expansion slots and is pretty good and in the same league of the HAF 922...
Lian-Li K62
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Also if going with 3way SLI, then IMO a Full Tower would be a better option...
Here is a very good alternative for the HAF -
NZXT Phantom
http://www.amazon.com/NZXT-Crafted-Tower-Steel-Chassis/...

3 way sli the 580 and really want only either of the 2 I listed

^ GTX 580 Tri-SLI ?? You sure of going that route ? IMO its not worth it...But if you still want to, then its your call...
As for the case, then look at the HAF X - Similar to the 932, but has far better features...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

uhhhhhh whats wrong about tri sli..................................so anyway 2 way sli is that ok 2 580's is the haf 922 ok.

and just incase will go with tri, can the haf 922 be alright with just 7 slots?

^ Not all games will take advantage of that, also scaling issues still exist in many games...2-Way is fine,...

CASE - 922 for 2-way would be fine and I would still suggest a Full Tower for Tri...

since HAF X is too expensive, is the HAF 932 OK just incase I want to 3 way?

I've got 2 932's and they blow any case any config away......meaning, they are good enough for everything..... plus you have the advantage of choosing where you want to place the PSU.... on top or at the base, since a tri SLI setup might need a little more on the last PCIe slot thus, very easily changeable PSU placement helps....
It's also very roomy and has a lot of space to be able to manage the cables very well, go for the 932..... and you won't need another case for a very very long time.....

Thanks Ill go with the 932.

although sorry alyoshka Ill give BA to gkay09 since he is the one who pretty much delt with me

Best answer selected by kyleguy298.