This is a well discussed issue in audio circles. Some believe there is a formula that should be followed, others do not. Those that do have many angles, spend the greatest portion on Component A, next would be Component B,....etc. My philosphy is to balance your wants, needs and budget with the products you have listed. My personal thoughts are to favour the source, as any problems here will not be solved by the downstream pieces.
Let me ask you this....are you troubled with the purchases and the ratio? Are you happy with the sound? If you have listened to any products since, would you change your mind? If it where me, I would simply enjoy my system, and let others play the mathematical simulations. If it sounds good to you, what does it matter if you did not follow someone else's rules?
With regards to your pieces, you have made sound choices. The M80's would not be too much speaker for the Cambridge. These amps are good quality and would be a good match for the larger models. Conversely, you could add a sub to your current setup. This would increase the flexibility of your room placement
Regards,
BBIBH
