Without a budget or indication of your inclination for style it's really hard so....
HAF 912, 922, 932 or HAF X
Antec 900 Two, Antec 1100, Antec 1200
Fractal Design Define R3(Or any of the other fractal design cases)
Corsair 650D, 800D, 600T, 500R
Lian-Li's are good
NZXT Phantoms are good
Stay away from:
Raidmax, Antec 900, Logisys, Apevia.
That's my 2 cents.