Hey guys, i wanna ask what's the best casing for overclocking around 4.5 ghz that's under rm250? i've kinda set on 300r but the 200r looks better IMO and its cheaper. any case that can rival these two at the same price? (Except CM cuz i dont like the design >.<)

Sifus please sugest me any casing, that's slim if u put i vertically, i googled on rvz01, its slim, but doesnt look nice >0< any other suggestions?
(preferablly width <150mm)