Honestly, I just finishes building this system 1.5 weeks ago and I loved building in the HAF X. I imagine the other HAF models being very similar. The size is pleasant to work with. Everything is top-quality, it has really cool features and enough accessories to fill two cases. My only dissapointments: If you put a 2nd 200mm fan on the top, then you can't use the USB 3.0 ports (Who uses front ones anyway). And the instruction manual is not-so-good. But everything else is amazing. It also weighs one ton. Seriously: my build weighs 55 ish pounds?
Depending on what you want, the HAF X wins 10/10 in my opinion, I would consider buying it if I were you.