I wanna rock -- with monitors on stands

I am currently running 2012 Reference 3A MM de Capo i's sitting on 26 inch four post Sound Anchors. My front end is a VPI Classic 3 with a Lyra Delos cartridge (a marriage made in heaven, by the way). I have a McIntosh C50 preamp and a McIntosh MC275 mk. 6 amp.

I listen almost exclusively to 70's and 80's rock, new wave, and punk. The Reference 3A's have been awesome. I much prefer them to the ProAc Response D2's I replaced. (Better imaging, more air, better bass, more efficient). Is there more of that? Can I trade up to even more air, imaging and bass? An even more lively sound? Floor standers are out the question. My budget for new used speakers cannot exceed $4500. Your thoughts appreciated.