Kudos! I hope it works for you, and you post a review sometime after you've had a chance to use it. A sale prior to a new model release is common - that's how I got my LLB Microlight 2 for about half of what the the new version goes for now. They ended up shaving 30% weight off in the new model - through use of thinner materials of course. I'm happy to have saved the money instead ... I'm not sold on the notion that you can keep thinning out material without consequences to durability and function.
I agree with ScareBear, I wouldn't worry about condensation issues - the QD1 will likely have a bit less than others, all else being equal, due to its vent (that's one feature I wish mine had, but I can vent decently thru 2 side entry doors). Condensation is affected by many variables anyway, only one of which is tent design.
Best wishes on your thru! When/where do you plan to start?