If you can live without HDMI, go out and find yourself a clean used Yamaha DSP A1 integrated amplifier/processor. This former flagship unit is among the best that Yamaha has ever produced and you can buy them for a song compared to comprable new units.
The Denon amp gets pretty good press to mate with the Denon preamp. McIntosh amps are always a good choice, a MC205 or 207 would be a great choice. There are tons of good ones out there. The P5 and P2 would be a great combo.