Yeah you have to decide whether you're going mini itx or micro atx? Then you need to decide how powerful a system you want in there, and what is your budget?
itx cases:- Silverstone SG07 with 600W psu (full fat gamer), also comes in a windowed model but is expensive, Silverstone SG06 or SG05 limited to 300W psu for the standard model and 450W with the black interior versions.
matx cases:- NZXT Vulcan - comes with handle.