RD, as Bren points out, you don't have a choice of powers, despite the misimpression that you got from the manual or specs. At a frequency where your M60s are actually 6 ohms(speakers typically vary fairly widely in impedance at different frequencies), your 1705 would actually be capable of delivering at least 110 watts and probably a bit more since receiver ratings are generally slightly conservative. Don't be too impressed with this since you'll be using about 1 watt a majority of the time and it's entirely likely that you'll never hit over 100 watts. Your 1705 has a menu setting for lower impedance, but it should be disregarded and left at 8 ohms. As Bren also pointed out, such menu settings or switches only reduce the maximum voltage(and therefore current and power)available in a concession to UL and liability concerns.
