A/V Receiver Recommendation for a newby.


Hi folks. I'll be the first to admit I'm not very knowledgeable when it comes to home theater systems.  I know the basics . I recently bought a  pair of Bowers and Wilkins 702 s2 speakers along with the htm 71 s2 center  channel. I have a pair of PSB GB1 book shelf for the rear speakers.  I currently have an Onkyo TX-NR676 a/v receiver.  I've been told by multiple people that this receiver isn't powerful enough to drive the B&W speakers and am looking to upgrade. I do have a limited budget after shelling out $6000 in speakers. I was wondering if anyone has experience with the Onkyo  TX NR 797 or Denon avr 2600h or recommendations My max budget is $1000.
Thanks in advance. 
elwayfan
OP:  Marantz just announced its new line of AVRs this week, so last years models should either be on sale now or soon, if interested.  The new models are denoted SRXX15 (where XX is either 50, 60, 70, 80).  

Last year's models are SRXX14;  previous year SRXX13, etc.

I got an SR5012 just under two years ago.  Marantz really pushes new AVR models out every year.  Usually there isn't much that changes, though I haven't kept up since my purchase and can't speak to specific changes year-to-year.
You purchased speakers that should have a receiver worthy of their quality,  a receiver that is powerful, a receiver that can bring out the best of your speakers. 
In my case I bought the Anthem MRX720 receiver and my speakers (Merlin VSM MME) came alive, sounded clear and awesome. So depending of your taste in sound if its Marantz, Yamaha that suit you.
I had an Arcam AVR400.
My advice is spend the money for the heart of your sound system, if you cant now save for later but buy the right thing
Anthem if you can afford it, Marantz if you can't. Personally, I think Marantz has been doing a great job for the last few years in both the mid-price and higher end spaces. My only issue: I get the 'porthole' styling as a nod to earlier - wayyy earlier - models, but there are better styling cues.