is it worth it

[d.white]

I have klipsch reference speakers in my ht,and i was thinking of buying a amp for my center and fronts. Ive read that these speakers need very little power to perform and that using a amp wil have little or no difference in sound. Im currently running them with a yamaha 663. Just want to here some opinions from people with these speakers with a amp, preferably an emotiva amp since thats the one i was thinking about getting. Any suggestions would be great.