Really? 27% off is tempting, especially since I'm not exactly in the mood to reward S-E.
Seeing a decent handful of people getting invalid keys and getting shit (as in, none, really) customer service.
Which, I mean, is common for these sort of sites. So if I were going to brave that avenue, I'd wait for the more reputable ones, who will likely end up with similar prices.
The pre-order stuff just went up on a Friday, I bet we'll start to see a decent trickle of deals during the week, especially after the console version releases.