With an 88R, you can fit pretty reasonably sized CPU coolers in there. There's the Pure Rock Slim mentioned above, Noctua U9S (D9L if you prefer that dual-tower look), Hyper TX3 and the evo version, Cryorig M9i, Arctic i11, Raijintek Aidos, Scythe Katana, etc. If you like the look of the low-profile downdraft coolers, there's the Silverstone AR06 and NT-06, Noctua NH-L9x65 and NH-L12 and NHC14S, Cryorig C7, and the Deepcool... Gabriel, was it?