Replacement center channel speaker?

[Hammie]

Here is the thing. You need to look at the long term here.

If you get the Boston center, are you going to want the Boston CS line fronts. Have you had a chance to listen to any speakers yet? That is going to tell you more than any specs you find online. Specs are nice to get an idea of performance, but your ears will tell you whether your taste in sound likes it or not.

For example, Klipsch looks really good on paper, but I do not like the sound of them. they are far too bright for my taste.

EDIT: It's sometimes hard to shop to a budget without haven listened to speakers. I would suggest you go listen and then find out what you like. If it is above your current budget, I would suggest waiting and saving.