I really asked so that others know what you are working with. I don't have direct experience with Anthem, but I can give you my thoughts.
The Anthem products have been stated as being excellent products. Reading a lot, the Anthem A2 tends to be towards very transparent and clean (as well as their other preamp style products).
Your Cambridge is engineered to be very transparent/clean/revealing. The Rotel is also more of a transparent/clean signature (to the point that several people do not like Rotel because it is too "bright"). When you combine these two with the Anthem A2 amp, you will have a lot of detail and transparency and attack. However, I think there may be a slight possibility that it will be too bright/harsh.
Another amp you could look at that is in the same budget range is the Parasound A21. I have seen it written that it is not as transparent as the Anthem, but I think it may "sing" better in your situation due to its high bias into Class A. I think it will fill out the body of midrange and midbass better than the Anthem and the sound will be smoother / less harsh (not that I'm saying the Anthem is harsh at all). The Parasound has a significantly beefier power supply (it's 60 lbs compared to the 32 lbs Anthem). The Anthem A2 looks to be just an A5 with only 2 amp boards and a trimmed down power supply.
