been looking at a amp for my RX-A1020. dont understand why almost all the the yamaha amps i see are not much more in wattage than what my RX-A1020 is already putting out. what would be the purpose in spending $800.00 for a amp that puts out 120 watts to connect to a receiver that puts out 120 watts. and why is that it seems most home apms are in the 90 - 120 watt range and not like the ones they have for cars, which are in the 400 - 1200 watt range.