I'm in the process of building a house, and as dry wall hasn't been put up yet, I have the luxury of deciding how to wire the rec room for home theater (speaker wire). My question is should I go for 6.1/7.1 or 5.1? How much is out there right now in 7.1 and is it likely to increase in the future, or will 5.1 be the standard for sometime to come? We plan on staying in this house for about 5 years. Is 7.1 the system that has a center-rear? Also, any receiver recomendations will really be appreciated. Budget will be $1200-1500 new or used. Speakers in the front and center channels will be Magneplanar MMGs (4-ohm), and for now, the rest will be Polk monitors. The reciever/amp will spend 80% of its time just playing music through the front two channels. I also have a 2-channel 50W tube amp at my disposal if it needs to be worked into the system some how (that's right, I don't know much about HT). Thanks in advance.