This forum should actually be titled - AV Receiver, Amps, & Processors
. Indeed this is a question that would be better served in the 2-Channel
Unless your budget is desperate, I would scratch the AS301 and RS301. First and foremost, you have some good speakers, they deserve an above average amp.
Here are full specs on the products -
Yamaha AS501, 85w/ch, DAC, Phono. Sub-Out - $550 -
Yamaha RS500, 75w/ch, AM/FM., NO dac, Phono, Sub-Out - $350 -
If we go by price, it would seem the AS501
is the better amp. It is minus the AM/FM and cost $200 more. Though, I know that the Yamaha AS501
is indeed a good amp. So, that would be my first choice.
However, if the DAC is not critical, and you can afford $550 for the AS501
, then consider the RS700
with 100w/ch -
Yamaha RS700, 100w/ch, AM/FM, NO dac, Phone, Stereo Pre-Amp Out, Sub Out - $499 -
That would be my realistic second choice.
I have an older version of the RS700, which is the Yamaha RX-797 Stereo Receiver (100w/ch).
I'm very pleased with it for the money I paid, which was considerably less than the suggested price shown above. Though my Receiver as a B-Stock unit, it has performed flawlessly for several years.
If you need a DAC, then what do you need it for?
Good DACs tend to run between $200 and $500 with $300 being very common. If the DAC is to connect a computer, you can get a USB-only DAC for about $100 to $200. If to connect a TV, you can get a basic Optical DAC for about $25. So, the Integrated amp with built-in DAC is something of a bargain.
So, of those you suggested, I would lean very strongly toward the Yamaha AS501.
Though it doesn't seem to be of interest to you, if the thought of Network Streaming of Audio
has any appeal to you, then consider the Yamaha RN602 Network Receiver -
Yamaha RN602 Network Receiver, 80w/ch, AM/FM, Bluetooth, Network Streaming, HiRes DAC, PHONO, Sub-Out, USB-Media - $599 -
Again, adding Streaming to an amp is going to cost in the range of $100 to $1500 with $500 being very common. That makes the RN602
with Streaming built-in a real bargain.
But for me, the intersect of Power, Features, Quality,
always comes back to the Yamaha AS501.
Yamaha in general tend to be very high value. Few can match them for the price. There are higher quality amps, but plan on spending more and getting less. Yet Yamaha still maintains a high standard of build quality.
So, in short, with the limited information you have given, I think the Yamaha AS501
is the best amp.
To jump one step higher to the Yamaha AS701 (100w/ch) is $799
and the next step above that would be the Yamaha AS801 (100w/ch) for $899
. I would expect very good things from the Yamaha AS801
which has very high quality Hi-Res DACs and adds a USB-PC Port. USB-Media means you can only connect Media sources like Thumb Driver. USB-PC means it can be connected directly to a computer.