I am new to the forum, and I am trying to put together a modest Polk system with some used Rti70's and a Csi40 I just acquired. I am on the prowl for some Fxi speakers for surround duty. I have been looking for the Fxi30 and Fxi50 mainly, as they were timbre-matched with my fronts and center.

My questions is whether I should look for other possible candidates such as the Fxi5, Fxi3, Fx300i and Fx500i. I know they are not exact matches with the Rti70 and Csi40, but will they match well enough? I appreciate any advice from the Polk gurus here.

Thanks, CK