Yeah, I'd stay away from the unauthorized "dealers" selling new but without warranty, unless they're somebody on Audiogon with a lot of good feedback.
Buying used is a bit of a gamble, but it can be worth the risk too if you stick to reliable sellers (good feedback). I'm pretty picky about my stuff, too, but I've found lots of good deals on the used market over the years. It does take a fair amount of time and often patience as well, though.
As for the Imagine T2, they're apparently (based on the NRC measurements) a little less bass-heavy (ie, less warm balanced, more 'neutral') than the X2T. Their bass might be a little tighter/cleaner, but I haven't done a head-to-head between the two, and bass is tricky to compare because it's so room and placement dependent.
Other than that - and of course the much nicer looking cabinet - they're probably quite similar.
For your room I'd probably recommend the X2T over the T, but if you can find the T2 at a good price and in good shape from a reliable seller, that might be better than the X2T. Really comes down to whether you like a bit of bass emphasis or a more neutral presentation.