My current setup consists of a S-Center II (studio series), ND-310 fronts (older northridge with dual 10's, same as E-100's) and N-24 surrounds (4" northridge). I've been running this for a while with no sub, but I'm going to have one real soon, I'm just wondering if I still need the big fronts now that I have a sub? I would like to downsize the fronts if I could do so without sacrificing sound. How would the Studio S-38II bookshelf speakers sound compared to my ND-310's? Something makes me want to get the studio series all around but I'm afraid its going to be a step backwards from the ND310's. Any suggestions? Thanks!