My opinion - stick with Yamaha. You can't beat a matching set. I could recommend the BIC CLRS 62 for a great center, but it's rated at 8 ohms and has a different sensitivity rating. It would be much harder, as you probably already know, to dial in a different make - especially when the drivers are totally different. Plus, those are nice looking units. Why mix it up when the price is right, and the sound is there too. Nice barter!