If the Axiom EP350v3 sounds better than the EP600 then I have to hear it. I was listening to Mark Knopfler's "El Macho" with my EP600 last night and damn this sub puts out musical bass. It will be a fixture in my hi fi gear for many years. My dad has the EP350 (version 1 I guess) and it does not come close to being as musical as my sub. I hope the original poster finds the bass he is after whether it be with Axiom, SVS or whomever.