Antec 302 vs fractal design core 3000 vs haf 912 plus vs 300r?
Out of all of those I still like the Fractal Design 3000. It is a steel case instead of plastic. It includes 2 140mm fans and 1 120mm fan. I can tell you the 140mm are very quiet. It has washable filters. I have only built 1 computer from a Fractal Design case but I am still very impressed and will probably use them for my next build.
I would rank the Antec 302 second. It is steel with 1 140mm fan and 1 120mm fan. I have built 5 computers with Antec cases and they are great.
After that it would be Corsair 300R, then the HAF 912. I just don't like the look of the 912.