Tonay, while the ideal may be using the same speaker in all positions, using a dedicated center channel and dedicated surrounds is the next best thing, and not exactly a huge loss since the manufacturer has voiced them to be as close as possible to their main speakers. I have always had a dedicated center and surrounds and I don't feel deprived in the least. Go with what works for you, and don't be concerned about it.

Jack

"People generally quarrel because they cannot argue." - G. K. Chesterton