New guy please be gentle. Fronts and Surrounds are 4 Martin Logan LX16s. Center Channel is a Martin Logan Motion 30. I love the folded motion tweeter. I plan on upgrading my fronts to Martin Logan Motion 40s when economics allow and sliding 2 of the LX16s to rears at that time. With all that said I am looking for a good, reasonably priced Subwoofer that will compliment my existing components without upsetting my neighbors (I live in an apartment). I look forward to everyone's suggestions.