I'm not the best person to ask regarding pairing, I'm still relatively new to hifi/home cinema. As far as the BD650 is concerned, I don't have a bad thing to say about it, blue ray looks awesome and as for cd's, I don't think i'll be buyin a seperate cd player anytime soon. Oh......and loading time is very very quick, so no waiting about.
Like yourself, I will be pairing it with a CA amp at some point, I just can't make up my mind up whether to go for the matching 650 or step up to the 740!!!
I will say this though, connecting it up to the multi channel inputs on my reciever has made a world of difference.