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.