I've never owned a Yamaha amp before and was looking for something moderately priced that would be a good representative of "Natural sound". Is something like a M70/C70 good, or would I be better off with something like a CA-1010? I know the CA-1010 has class A and is an integrated, and have been reading a lot of threads about C/M70 issues, how available are relays for a C70 or should I just consider something different? Are the CA series integrateds considered built well and reliable? I'm open to other suggestions also, thanks.