I already have a Denon AVR-1612 I got for $200, and just recently I found an used Denon AVR-3806 for $250, only $50 more than what I paid for the AVR-1612! The seller says he has had it for about 5 years now, but everything is still in good working order.
Is it a good idea investing in the AVR-3806 and sell off the AVR-1612? It feels like the AVR-3806 is a bit too old and outdated to spend money on. For example, the AVR-1612 has USB/iPod port and can control iPods when they're plugged in, the AVR-3806 doesn't have that. I also feel like the AVR-3806 probably won't last much longer since it has already been used for about 5 years. I want it to last or it would feel like I just threw $250 in the trash. Should I just stick with my AVR-1612 or buy the AVR-3806 and try to sell off the AVR-1612?
Also, the receiver will be powering a pair of Polk Audio Monitor 70s, and will be used solely for music, no HT at all. The 1612 has 75w per channel at 8ohm while the 3806 has 120w per channel at 8ohm. I don't know if that'll make a significant difference in powering the Monitor 70s.