. i personally rather putting water blocks on gpus and a good air cooler on the cpu usually if i have to choose .....
I went through this dilemma last fall. After having used the 800d for several months now, I would definitely go 800d for water, or HAFX for air.
Here's My comparison list.
700/800D:
+ looks good, but slightly boring IMO
+ Haven't seen anything beat it for cable management.
+ Good layout for watercooling.
- Mediocre airflow (again I'm watercooling anyway but still need some airflow)
+ Aluminum front panel rather than plastic
+ huge CPU rear access panel
HAFX:
= Styling is... perhaps a bit "busy" for my tastes but more than acceptable
+Great front panel with usb 3.0 and esata
- Stupid sliding cover for power button
+ side panels are "shaped" which makes them less prone to flexing/vibrating.
+ comes with wheels