Steve, I have a VPI Scout with the standrd JMW-9 arm ,the table sits on a Ginko Cloud 11. I have added the Super Platter and have had the SDS for some time. This maybe overkill for the Scout but my long range goal is to eventually sell the Scout as original, keep the Super Platter and SDS , then up grade to the Super Scoutmaster minus the platter, then install the Super Platter on it.
As far as the upgrades effect,The SDS system really improves the stability of rhythm and pace by giving the tt a constant speed. The Super Platter sounds better than the all Acrylic one by a long shot, plus the mass gives more of a solid foundation to the sound IMO. I never have cared for the sound of all acrylic platters.
I hope that this helps in your decision.