The rads he has will be fine- I don't know that TDP has been released for those cards yet, though. Either way, I don't see there being much of an issue, here other than people tossing around new cases to buy.
Any case can be a watercooling case with the right tools, patience and good planning.
Might I ask out of these two cases would be easier to watercool Rubix? I asked in a diff thread and got no response, storm trooper or the 600t white be nicer to setup water-cooling in? I know you stated above that any case cam do it, but between these two specifically is the storm trooper a larger tower? One last thing, I'm torn between the Swiftech h20 220 $350 kit or get by using a H100 until I get a 2nd 7970 card?