If you have the older Aries 1 platter than you should stay with it I think your fine. You have a fine deck leave it be, make the best upgrade and work with your room acoustics and you will find even a larger improvement.
VPI Super Platter
From what I read here and at AA it appears the general consensus is that the Super Platter is a fairly significant upgrade from the all acrylic platters on the newer Scoutmaster and Aries turntables. However, I have an older Aries 1 with a fairly heavy platter that resembles in appearance, the Super Platter. Any Aries 1 owners know the one I am talking about? Would the Super Platter be as significant an upgrade to this platter as it is to the acrylic ones? Also, does the inverted bearing that comes with the Super Platter represent a significant improvement over the bearing I already have. My Aries is about 6 years old and has the JMW 10 tonearm. I also have the SDS.