Hiflyer, although I've never listened to the Ref. 30 pre/pro, I've read several reviews on this unit and all were negative when it came to sonics. Therefore, it should go. I've been using a Primare P30 pre/pro off and on over the last few years and it can hold it's own with any solid state preamp I've listened to, demo'ed, or owned from $8500 down. It's an excellent 2-channel preamplifier that retails for around $3700.
In addition, you've replaced an excellent Clayton amplifier with a Bob Carver Sunfire amp. At least one or more of the Claytons ranks among the very best solid state amps. The Sunfire amps never do.
I hate to say it, but t would almost seem as though you're moving in the wrong direction.
I don't know what you mean by a highly modified CD unit. But there are certainly some excellent alternatives out there if this one is not sufficient.
Lastly, I've not heard of 'MAS' cables. Perhaps, you might consider auditioning (before buying) some other cables. I've thoroughly enjoyed the Audience AU24 speaker cables and interconnects and you should notice that some others around here have as well.
I would focus on putting together the finest 2- or 2.1- channel system you can mustar.
If you focus your attention and your monies on vibration control(coupling or decoupling) i.e. racking systems, points, etc.room acoustics, line conditioners, dedicated lines, etc., for a 2 channel system, you should notice that if it sounds wonderful for music, the exact same system can and most likely will sound just as wonderful for movies.
-IMO
