What I feel the E150P is lacking is actual LFE. I have it calibrated well I believe but watching the beginning of Star Wars Episode II when the queen's ship flies by for example, the subwoofer just blares and rattles so I have to turn the volume to a little past half way. At this point there is a nice bass extension over my speakers but thats all it is just added bass, you can't really feel it. I believe A friend of mine has that JBL model you mentioned j_garcia and I remember being really impressed with it. The same scene in Episode II played through that sub with authority and you could really feel it in your chest. I'll have to confirm with him if he indeed has the S120PII but it looks like it in that picture. Excellent options here guys I've got allot to think about, The Free Shipping Is nice on that JBL.