Here's a demo pair of Nola KO2s from a dealer who is apparently selling off inventory. No offense to your Def Techs that are very good speakers for the money, the KO2s will bring you to another level entirely on every level. The reason I'm recommending them is that they're overall awesome speakers, and the mids and highs are dipoles, which will image more like your speakers that I believe are bipolar. These were $14k retail new, and you can get this demo pair for a little over $4k presumably with full factory warranty. Buy these and thank me later. If for some insane reason they don't absolutely blow you out of your chair you can probably sell them for a profit. Maybe to me if I can get the wife to loosen the screws.
https://www.upscaleaudio.com/collections/nola/products/nola-ko-loudspeaker
https://www.upscaleaudio.com/collections/nola/products/nola-ko-loudspeaker