I am looking between the BOSE companion 3 and 20s. I have 2s now but, I am looking to upgrade. Tested the 20s at the store, and they were solid. the 3 is $50 cheaper at sam's club, but has a subwoofer. The guy told me the 20s will sound similar, even without the sub, but I'm not sure if that's true since I couldn't test a 3. Any thoughts?