buget used amp ?

This won't be a popular recommendation but a practical one, try a Crown 1500, 525 watts at $450 new. I used one with ACI speakers, have A21 now with my Maggie's. Your speakers need power and you are on a budget. 

I would add Parasound HCA 2200 mk2 to the list.
Also, there is PAS 2002PCA, sold new by thomannmusic.
It’s a PA amp, speakon and xlr connections only, still I tried it on the account of the positive user reviews, and I kept it. Not as powerful and warm (excessively warm?) sounding as HCA 2200 2, still a very capable amp (NB: it’s got no feet, and it’s bright blue).

dougm5740: that's a Crown XLS1502. It is an 8.6 lb powerhouse! If I didn't already have twenty amps on hand I might buy one to try on the DQ10's!

Again thank you guys for all the feedback it helps alot. 

I wanna added some fuel to the fire here.

Is it possible that changing my rca cable from my pre to my amp might open things up a little?