They all have ruler-flat responses, so they are all very accurate. One advantage that the ULS-15 and 1723 might have for a studio setting is the inclusion of balanced inputs. The SB-3000 does not have that. Since accuracy is the #1 priority, you really should be aiming for two subs (or more) in order to tame room modes and get a flat response. Yes, these subs all have a flat response, but that all goes to hell in room. The way to combat that is a multiple sub system where the subs are placed optimally to flatten the in-room response. This matters much more than what brand of sub you get, if you are serious about accuracy.