I'm considering M22 ti's for 2 channel stereo listening. I listen to lots of opera, jazz, & classical. I have an 25 year old yamaha 1020 receiver. I have a 2 year old rotel 951 cd player. (my current speakers are 25 year old kef 103's.) I have no clue about selecting a subwoofer and if my receiver matters in the choice. I want to spend what i need to optimze the sound quality, no more/no less. What subwoofers are most compatible with the M22? Any comments on the Cambridge Soundworks subwoofers from the 8s up to the P200? I have an 25 year old yamaha 1020 receiver. I have a 2 year old rotel 951 cd player. (my current speakers are 25 year old kef 103's. thanks,