I want new fronts but unsure which ones..by the time I buy the stands for the m22 its almost the price of the 50's..whats the main difference between the 2. Im using 15 yrs old Panasonics now with a large bass,a tweeter and midrange in it. I also have a VP100 center and QS4 sides and a yamaha sub..in about a 400sq ft room..thanks for your advice.Tom