By "best" I mean which case can provide the best cooling possible. Also, I would prefer if the case had air filters near the fans as well as room for extra fans. It has to be a full tower atx case. My budget is around 120 after rebates and shipping.
Anything larger will have better cooling from the air being able to circulate the case better my Antec 1200 has been great for the year and a half i have owned it.
I just found the In-Win Track Mid tower ATX case and you want to talk about cooling. It looks as if things can get cramped in there but what people have said its a great case for the price and cooling. I've read you can put some beefy graphics card (10" - 12") into it with no problems. The only problem i see is, if you have an after market CPU heat-sink, you might run out of room and conflict with the side panel.
removable fan filters for easy cleaning, MANY cable routing holes for cable management.
bottom mounted psu, but u can face the fan out the bottom of the case, theres a cut out for the fan with a fan filter there as well. Every thing is also tooless. And theres a sata hdd dock built in the top
i love this case, if i didnt go with a fully clear acrylic case, i would have gotten this one