I've got the PC7+ and apart from the hard drive arrangement its not really very different in terms of space (yes i know the PSU is at the bottom, the top pops off, it has 140mm fans, and water ports, but it basically the same)
I had to leave hard drives out of where my 8800GTX's fitted, but it still fitted in with the frame - so the sideways drives in yours should be fine. If not I've got the lian li version of the iceydock you lot mentioned eariler - EX-33B - well its not removeable, but better cooling. lovely. I really only bought it to through air through to the CPU better, but it works a treat.
If i needed a new case and had the money to spend i'd probably get one. love the 7 series. will be interesting to see how the new PC8 and PC9 fair up.