Considering a 'new' 200w amp. MF, krell or?

Ive been updating my system fro the last few years and am using a Musical Fidelity A3.2cr, Cary 303/200 and B&W 703s. Wasnt until i added the Cary recenty did the sound war, up and the listener fatigue subsided. I need more power though and have been considerig the MF A300cr, cary Cinema 2, and the Krell Kav250a. Unfortunatly theres no dealers around town with that gear.
I listen primarily to rock music and like it loud at times but also imaged and detailed.

Any ideas or how those amps differ in sound? What other amps should i consider?
Thanks