im looking for a new av unit. thinking about hk 2600, denon 1910 or maybe pioneer 1019 any thoughts or help on these or any others in this class.

Those are all fine units. The main thing is to find the receiver that has the features your looking for, and not worry to much about sound differences. What is the room size, type of speakers, listening habits, etc...?

room size 13/18 currently using cerwin vega vs100,buying m22s soon w/sub, rock,jazz,rock opera