In my experience I can tell you I didn't like the timbre match of the 8 center with the 8.3's I have for mains.
So I ended up getting a single 8.2 to use for my center which works much better but I'll probably be getting a 9CM center soon to replace it when my budget permits.
Welll Guess what..... Popped into local Hifi Shop...tested the 9.1 They amazing.....They were just a little more expensive then the DFS. I ended up buyig the 9.1 for my Rears ( They sounds great ) And Diamond 8 series Centre...... Exellent Vale for the price.. ( Sounded better then 9 series centre)
Thanks for all the help.... The excitement of home theater never stops