Hi Alphawave, I thought you were set on the
BK XLS200-FF MK2. Did the speculation about it's output in your other thread make you nervous?
For your 100% music usage and room size, I maintain that the BK will be perfectly fine. It also has all the connections and adjustments you need. If you have second thoughts about it's output, ring BK and quiz them about the maximum SPL it produces while maintaining the published frequency response and reasonable distortion levels.
Given your increased budget, you could step up to the
BK XXLS400-FF to be 100% sure. However, to increase your chances of a uniform bass response, I'd encourage you to aim for dual XLS200's ultimately; one now and a second later on when funds permit.