Finally upgrading my amp

The Rogue Sphinx V3 integrated around $1700 with a good phono stage.

I support all the suggestions so far. Used gear is the way to go unless you have a big wallet or want the security of "New". In addition, the amount of functioning used gear is almost unlimited. If you enjoy the hunt, CL and MPlace in your area is a great place to start. No shipping and prices can be amazingly low and most sellers are not getting enough traffic that they eventually just want it out of the house. Upgrading your current Denon to newer main stream brands like Denon, Yamaha, Marantz, Pioneer etc can be rewarding and may meet your desired enjoyment needs. Then you can continue to swap for better and better gear. Add a Streamer like a $219 "Wiim Pro Plus" so you can evaluate your next upgrades and features that you would like to add to you system. As you can tell I am frugal because I have to be but the system I have put together on a frugal budget that provides me with enjoyment that I believe is an audiophile experience. Good luck hunting and have fun!!!!

Hegel 190. Preowned within your budget. Or up your budget to 3500 and get the Hegel 390 used. 

There are lots of great options, I would probably go with the Hegel H190 if I were in that range.....2 x 150 WPC 8 ohms/2 x 250 WPC 4 ohms, stable to 2 ohms, good built in DAC, built in streamer, well built, excellent reviews and very well thought of; and shouldn't have a problem driving your speakers