Upgrading receiver: Got a pair of Dynaudio Sapphires+NAD C740


Hi,

I recently upgraded from Totem Staafs to Dynaudio Sapphires and of course love the new speakers. I believe my receiver is not doing justice to the speakers and need to upgrade. My budget at this time is $1500. Here are my constraints and questions:
1) If it is worth upgrading from NAD c740 to a higher end Stereo receiver?
2) I need a receiver with ability to drive two pairs of speakers (main dynaudios and other ones are totems in another room). Any suggestions?

ray_sonya
Id suggest you save your money and up your budget and get something worthy of the Dyns
Thanks folks. I apologize but I am an amateur so here are the next set of choices:
1) SimAudio Moon 400m
2) Bryston 4BSST2
3) BelConto Ref 1000M

Which one should I go for and why? Thanks again!!!
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You check out a Peachtree 220se ? Inexpensive, sounds great, 20lbs, and loads of mustard.