your main point was that you dont want to have to upgrade, if you get the 10" model you will definitely want to upgrade...let me put it this way, clubs dont use 10" for a reason, 15's are just the way to go in all honesty look at it this way, 2x10" speakers will have little bass and average mids n highs + 18" sub with massive bass (sub may drown out the mids a bit from the other speakers) vs 2x15" with all round good bass, mids n highs Most importantly, that sub that was linked is passive, meaning it does not have a built in amp and will need an external 1 to power it, and a semi powerful 1 at that (not cheap)