Rear center speaker

[snodog]

I have all paradigm speakers and just bought a center cc-370 for $345. I would kind of like to buy a rear center but was wondering what type of speaker to use for it? Do people normally use a front center speaker or is there a cheaper alternative?

[markw]

If you can buy one singly, the same speakers you use for your rear surrounds would be ideal.

Problem is that many speakers are sold only in pairs.