I'm thinking of replacing my old Yamaha RX-V663 and the Marantz NR1506 has caught my eye. The 50 watts has me a bit concerned but from what I read its plenty for most people and speakers. Also the no DTS-X I'd kinda like to have but the rest of the receiver I like. Anyway have any thoughts on this receiver? I'm running Def Tech SM65's mains, SM55's surrounds, CLR2000 center and a SVS PB-1000. How is that sound quality? Thanks for any info.