I have a HAF 912 and I like it a lot. It's roomy, has good air flow (as the name implies), and it's a good size for me. Lots of room for expansion. Also, I have a non-modular PSU and it gives me good cable management options.
That said, there are some negatives - it doesn't have a side window (although you can buy one from CoolerMaster), it doesn't have cable management grommets, and the interior is unpainted.
So, if I had to buy another case, I'd probably buy this one: http://www.newegg.com/Product/Product.aspx?Item=N82E16811119257&Tpk=haf%20xm
It's quite a bit more expensive but it has better cable management, good airflow, more room, USB 3.0 on the front, and an optional side window.