For what it's worth, I too have the Marantz NR1501 which I use with a Mordaunt Short MS902s, a Mordaunt Short Alumni centre (ie. no sub), PS3, Humax Freesat PVR, Marantz CD Player (can't remember which one) and Panasonic 42PX70 TV. Like a lot of others, the 1501 is perfect for me due to space constraints and I bought it to replace a similarly sized Cambridge 540R V2. In my opinion, it delivers a very good performance and is a definite step up from the CA receiver which I also thought was pretty good (aside from lack of HDMI in this modern age!).
Interestingly, the Marantz is only rated at 50WPC whereas the CA is 100WPC but I would say that the Marantz is louder if anything. I had been considering the purchase for a while when the Marantz was sold by Richer Sounds at £400 but was waiting for a What HiFi review - in the end, Richer dropped the price by quite a large lump and I therefore decided to go ahead anyway and don't regret it one bit. As an aside, I believe that Marantz have now announced the successor to the NR1501 (ie. the NR1601).
Hope this helps.