As good as a mech board is, why is everyone suggesting it? It's not like it makes the PC run faster and it has nearly 0 effect in gaming the only real benefit of a mech is if your a web designer, office worker or coder and it provides less strain on your hands/fingers.
OP: An SSD is whats going to give you the best performance boost. Then I would go maybe a CPU liquid loop.
I wouldn't worry about a new case, that Apevia looks quite reasonable. But if you feel a real need to get a case then a CM690 II Advanced, a very nice case indeed and allows you to mount rads inside the case with minimum fuss.
ended up buying the htc hd7... my iphone is dieing on me lol... need a phone for work anyway.
Payday in a few days, gonna look into an SSD and maybe starting my liquid loop.. we will see