Holy thread resurrection Batman!
Just thought I'd chip in as I built a new system into a 680x a couple of weeks ago.
I love this thing! It looks amazing, is really quiet and has good airflow, despite some of the reviews claiming otherwise. The dual-box design is different but works really well IMO, keeping all the gubbins out of sight and making a nice clean build easier.
I'm currently just using an AIO for the CPU but am planning to go full hardline water when I upgrade the GPU later this year.
All that said, there is one design flaw I'm not very impressed with, which is whilst the front fans are all mounted to a removable panel which can be taken out whole from inside the case, as soon as you put a radiator in the top or bottom, this becomes impossible.
Cleaning the front filter thus requires either dismantling your radiator(s) or alternately removing the front panels to get at it this way. Combined with the fact that the filter is totally visible through the glass panel and back-lit by the fans makes even a small amount of dust very visible.
I guess I'll just have to resign myself to taking the front off the case every month to clean it out but it's annoying.