Peurto, The center's importance, I should have emphasized (but this is the home theater section!), is, in my opinion, most obvious for movies (DVD and BluRay), especially with discrete multi-channel sources, and it also contributes positively for well mastered music in this format (which can be spectacular in the uncompressed BluRay format).
For stereo sources, and with great left and right speakers like yours, a center certainly can get in the way if not degrade the sound (with the processor's help).
For stereo sources, and with great left and right speakers like yours, a center certainly can get in the way if not degrade the sound (with the processor's help).