Given the volume of your room, you might also consider a lower cost receiver that has preouts and run a separate power amp (or amps), especially if you end up with inefficient speakers like Dynaudios or Thiels-depending on the SPL level you want to achieve, it may be difficult to get there with a receiver alone if you have power hungry speakers. I agree with the previous posts-focus on the speakers you want first, then look at your input/control and speaker power needs relative to your receiver and/or power amplifier components. Just as a point of reference, speakers comprise around 60% of the audio portion of my av system budget if I don't include my turntable/tonearm/cartridge/phono stage (adding those in makes it more like 40%). As for refurbs, many here (including me) have had great success with refurb or B stock units from Denon, Yamaha and other well designed lines of electronics.
Another thought-have you considered using your 901s for the surround channels? In my experience, it is not as important for the surrounds to "match" the front and center channel speakers, and the 901 reflecting design might work well as a surround speaker (especially for movies). If you can hang onto them until after you get your mains and center channel speakers, it might be worth a test to see how they sound-you can always sell them if you don't like the sound or how they integrate with your other speakers.
