I totally buy record turnout for this election. If you're convinced the stakes are apocalyptic, why wouldn't it be? People point to Reid/Angle in 2010 as high unfavorables = high turnout. I find that a convincing theory.
I think that means Hillary will win by a large margin (7-10 points), but it also means that there will be enough ticket splitters to keep the house in GOP hands. I think for Dems to retake the house, it requires a GOP turnout collapse, not ticket-splitting. I know congress breaks late, but... eh. Even the senate looks like we're heading to a 51-50 split.