AV receiver for 4 ohm speakers?


I'm ready to upgrade my AV receiver to handle 6.1 channel sound, but I'm concerned about some posts I've read complaining that many of the "mid-level" 6.1 receivers don't handle 4 ohm speakers very well (the Onkyo TX797 comes immediately to mind). I'm using NHT 2.3As in the front, which are 4 ohm. The rest of my speakers are all 8 ohm (1.3As and SuperZeros). Anyone out there have any suggestions? I'd thought that maybe something like a Marantz SR8200 would work well . . . I'd like something that I can get new for under $2K.
tsrart
Thanks for all the suggestions!

As it happens, I just tripped across a really great deal on a used Lexicon MC-1 w/DD & DTS and a Rotel 985 MkII, so I nixed the whole receiver concept - I can live without 6.1 until I get around to having the MC-1 upgraded.
Tsrart - you stumbled across the answer on your own. ain't it cool? separates are the way to go and gives you so much more flexibility in your system. Please update us on what happens :)
Tsrart - you stumbled across the answer on your own. ain't it cool? separates are the way to go and gives you so much more flexibility in your system. Please update us on what happens :)