There's no one "best" case. All cases excel in some areas and fail in others. Things like asthetics are also a matter of opinion, so while one person may think a case looks excellent (and thus rank it higher), another may think it looks horrible.
For style, the TJ07 gets my vote.
For cooling, the Antec 1200 / CoolerMaster HAF 932 gets my vote.
For price / performance, the Antec 300 gets my vote.
For silence, the Antec P182 / P183 (with fans on low) gets my vote.
For overall build quality, various Lian-Li cases get my vote.
For features, the Corsair 800D gets my vote.
I could go on...