I have heard both the B99 and 5A speakers and feel that the B99 is superior. It has a wide sound field (am I saying the right?) so you don't have to sit in the exact spot to get the best sound, has amazing high, med and low clarity and oomph. In fact, I prefer the B99 to any other speaker I have heard to include the Wilson (Watt 7 and Max 2). Since the bass is so good, you do not need any sub, even if part of a home theater system. But, hey, overkill is part of the fun and who doesn't like thier feet vibrating and windows rattling when Arnold pulls the trigger? Probably the only speaker that ourperforms this speaker is the Wilson Grand Slamm v3 which sold for over 100K. They are also probably the best looking speaker I have seen. They have a high acceptance factor with everyone who has seen them.