Sound Stage and Imaging

Look for klipsch EPIC CF4 and thanks me later 

If you will be listening at reasoanble loudness (<90dB), I suggest DIY Linkwitz LXmini + Phoenix (alt) OB-subs - in that price range. Like being on the stage when listening to acoustic performances, and asking yourself, where does the soundstage end? However, they are not best at reproducing a rock concert front row experience - for that, find some Tekton DI's. If you want deep bass authority without seperate subs, try GoldenEar Triton series (anything 3+ and above - price used).

hickamore:  check hifishark.  There's a pair for $2500 now and, if you look under SOLD section, you'll see a good deal many have sold in the $2000 range or less, and I've bought many pairs of older speakers without crossover issues.  I'm sure it's something to consider but a demo should tell you whether there's an problem or not.

Studio Electric

Head over to the "ADS and Braun Speakers Fan" Facebook page and try to score a well-cared for pair of ADS L2020s, (which will fill your huge room) and / or ADS L1530s or L1230s. These are considered the pinnacle of ADS design and produce great imaging and sound stage, especially if you bi-amp them. Many of the units on the market have been recapped by the legendary Richard So, a former designer at ADS, who is still repairing and re-capping ADS speakers from his workshop in Arizona.