Denon 4306
This Denon is a brand new model so reviews should be out soon. You might find more information on some of the higher and lower denon models (4806 and 3806) and you can compare the feature set of these models on the Denon web site.
All HT receivers are designed to be connected to a powered subwoofer via an RCA cable. Look at the back pannel for at least 1 RCA jack labled LFE Out, Subwoofer Out, or Subwoofer Pre-amp Out.