matthewpiano:My audition list has been extended. A friend has recently moved some fairly expensive kit on and down-sized to a relatively entry level Cambridge set-up of:
340C CD player
340A SE Amplifier
SL30 Speakers
He has strongly recommended that I give it a good listen because he is finding it to be very infectious in its musicality and particularly flexible about musical styles. He reckons the tweeter in the SL30s is a bit special and that the whole system is actually more satisfying than some of the more expensive stuff he has had.
So I'm going to go and give this combo a good listen as well. I've got nothing to lose and I've already got a 340C. Seems like a long shot but thinking outside the box isn't a bad thing at times like this. It will be interesting to compare this to the Marantz and Rotel kit.
You know Matt, the more I read your posts, the more I think I've been blessed! You seem to go from one system or component to the next in a short space of time (this current Rotel/Pioneer/Mission setup lasted a fortnight, if that), but I think the biggest question you need to answer is really what is the kind of sound you like and how best within your budget you can achieve that.
My overriding feeling with the kit change is a multiple of sideways moves, but not too much going forward. Let me stick my neck out here, the CA 340 combo won't work. It might, but it's another sideways move IMO. You had a batch of highly rated kit already, albeit a few years down the line and it's gone!
FWIW, I would sit back down with the most recent rig, detail what of it you really liked and what you didn't. We know, given your feedback, that it is the high frequency noises that are grating, so, can you audition at no cost, some demo cables? Is there anything you can choose that will sweeten the 751s treble a little? You already said the sound was detailed and dynamic, but does that mean what you say it means, or are you really saying "actually, this is too bright and lean"?
If it's the former, then you're close to getting the sound you want, it just requires a slight tweak which an interconnect might do and if it's the latter, well, as the knight in Indiana Jones third movie says..."choose wisely"!
I do think you need to really decide what kind of audio sound you like - I have a wide taste in music like you; almost everything from the Dillinger Escape Plan through to the most genteel classical music and quite a few points in between, but I never sit back and thing "wish this worked better together"...just a thought and a few observations!