Tube Preamp and SS Amps - How?


I am considering moving to a tube preamp and SS power amp set up. Are there any rules of thumb in getting a proper match and what should I look out for or avoid? Any suggestions or insight would be greatly appreciated!!

Thanks!
stereomaniac
Wow! Have I got a lot to learn! I just have an integrated MAC MA6450. I was thinking about trying to use the amp section from that with some sort of an entry level tube preamp (Cary, C-J, Rogue??). Then eventually upgrade to a real SS power amp. Or, just sell the integrated and start over.

Any suggestions for a $2500 - $3000 set up (used)? Headphone and phono would be pluses!

Thanks-

John
Why not just swap your MA-6450 for an MA-6850? From what I
can tell it's the exact same unit except with a tube preamp
section. The MA-6450 is a terrific amp. I can't imagine the
MA-6850 would be much of an improvement.
Unsound-

I am ALWAYS checking the archives here on the 'gon! This is a fantastic site which I read until I am bleary eyed at 1:00 am in the morning. Thanks to all for your input!!! It is very much appreciated. The Audiogon community is the best!

John