Upgrade suggestions - from Rotel 1066 receiver

I am not displeased with my Rotel receiver but I'm wondering if there is anything else out there that would be a good upgrade. I do not use the video switching capabilities, just use it for audio in my simple HT system - movies, HDTV. Please see my system for component details.

I need two optical inputs, DTS, Dolby, etc. My DVD player does have DVD-A & SACD capabilities, but I seldom use it for this. Still, the amp needs to have good audio capablities. I would like something with a bit more power per channel (the Rotel sends 75W/channel) for my 5.1 speaker set up.

I only want to spend around $1000, if possible, and used is fine. If there is nothing that beats the Rotel, I'll just stick with the Rotel!

Holly