If you already have the center and it makes you happy then I would stick with what you have.
I like Yamaha stuff. My main beef w/ these--going purely off specs and since you asked for opinions-- is this spec: 40w 87db. It indicates to me that they will be strained at higher volumes, due to the small drivers.
I've found the Andrew Jones Pioneers sound exceptionally good for the money. I've put together a 7 pc setup for $525 with 2 floor stinging 52's, a c22 center, 2 BS22 highs and Fluance bipolar rears. They have a different aesthetic than what you are going for here, but way under $2k.