I have switched back and forth between KEF 105 2's and 105 3's as my stereo speakers and the fronts to my home theater set up. I am presently using a Monitor Audio center. IMO a Monitor Audio center (say a Silver), a B&W (say the HTM 62), or mid priced KEF center should suit you well. If you want to move away from the British lines, I have heard nothing but good things about the Revel c-12 when matched with many British speakers.
KEF 105/2 center speaker suggestion?
In a eclectic home theater system I am using a Denon 2809CI AVR with speakers I had collected over the years, KEF 105 Model 2's on the front, Bose 901's for the surround and the built in speaker bar for a Pioneer PDP-5070 plasma as the center. Surprisingly it has decent sound but I was wondering if anyone had experience with matching a decent center speaker to the KEF 105/2 speakers?