hi all,
I have a yamaha RS700 receiver (2 channel; audio only) and I'd like to add wireless music streaming capability. Been trying to figure out the best way to do it without breaking the bank (like a sonos).. there are all these kinda cheap looking B/T receivers at Amazon for like $25 with rca outputs. I suppose I could connect it to one of the aux lines, but would it be better to stream Airplay of WiFi? I'm mostly talking about quality of sound without drops (which can happen with B/T). Would getting a second Apple Airport Express (my main one is in another room) and using it for audio only work well, or is there a better WiFi option?

I'm lost in the sauce and would really appreciate any straight forward advice.

Thanks in advance!