Yeah but if you can buy a single card for the same price that outputs the same performance it'll be better.
I'm not saying sli is bad it's just not worth it on lower cards.
Corsair always makes good cases i have thier cheaper 200r and its feels solid, the onlt difference from the two cases is looks. choose which one you like better
buy the single card, SLi/Crossfire is only for higher end gpus, most games aren't even optimized for sli/crossfire
so go with the single card that costs as much as the dual gpu
a GTX 960 is a pretty good budget gpu