If you are dead-set on Cambridge + KEF, then specifically ask about Cambridge + Kef.
If you want other suggestions within a certain price range, forum members will need more information.
What do you have now and which aspects of the system’s presentation do you like and which are you looking to improve, in what way?
What is your budget?
New? Used?
Speaker sensitivity? Amp power rating?
SQ: Neutral? Warm? Forward?
What sort of music do you favor?
Source?
Room size/constraints?