arniespin
It's sales like the one you got that will drive down the price of my 3.7s if I have to sell them!! ;-)
Lucky guy.
Sounds like you are well set up for the 3.7s. I'll be really curious what you think. I'm driving mine with 140W of conrad johnson tube power and they are controlled beautifully from top to bottom. The 3.7s are a bit overdamped in the bass relative to a lot of other big speakers, which actually makes them easier to place in real rooms. You can really modulate the sound via placement (like most speakers). I tend to prefer a nearer placement (I'm about 6 to 7 feet from mine) and the 3.7s remain coherent close up (the coincident mid/tweeters and their wide bandwidth certainly help that).
The 3.7s sound smooth either toed in or toed out - the more you toe in (again like many speakers) the brighter and more focused the sound.
I actually prefer the Thiels widely spaced, facing essentially straight ahead, with just about no toe in. The sound becomes much bigger, more spacious, with more dimensionality and depth to the imaging, but also a warmer, richer tone.
I'm curious what positioning will work best for you.