Dklap, I'm also using a Denon receiver (AVR-3801) as a pre-amp for two channel music. I recently bought an Acurus A150 ($340 used here) to bypass the Denon's internal amps. I highly recommend doing this. The sound is much more dynamic and detailed. I also use an AudioPrism WaveGuide on the power cord to the receiver. This is a nice tweak in lieu of replacing the captive power cord. Highly recommended by a SoundStage reviewer for just this application.http://www.soundstage.com/revequip/audioprism_waveguide.htm.
The Audiogon member I bought the A150 from has another one for sale. If you're interested, email me and I can put you in touch with him. Whether you chose this amp or one of the others recommended here you won't be disappointed.
The Audiogon member I bought the A150 from has another one for sale. If you're interested, email me and I can put you in touch with him. Whether you chose this amp or one of the others recommended here you won't be disappointed.