I would keep the center channel and the front left and right as close to being the same as you can...if you have 6 1/2" drivers in the fronts, then go with 6 1/2" drivers in the center...and yes, definetly go with the same brand of speakers as well! I would look at the PSB image line...they offer quite a nice sound for the money!...you should be able to get a good deal on them here on Audiogon...good luck and happy listening!
