VPI Scoutmaster Upgrade

I presently have the following VPI Scoutmaster configuration:

VPI Scoutmaster
JMW-9 Sig. tonearm
Periphery Ring Clamp
Center Weight
Dynavector DV-20X Low MC
Dynavector P-75 MKII

I very please with this configuration but would like your opinion on an upgrade to my existing configuration to further improve the overall sound.
I might consider the super platter as the next step. Not cheap but it will make a diference in what they refer to as PRAT. After that, go for the rim drive if you want to try something else.(will be available for scout master soon I believe) The 10.5i arm is nice as well but the 9 sig does a great job also. Just my 2 cents. I think you'll enjoy any of these in any order.
Having owned the Dynavector P75 MKII, and currently use a Dyna XX2MKII cart with Sig. Scout, I recommend a phono stage upgrade. I went from the P75 to a modded Simaudio LP 5.3, and I'm sure it would be money well spent. For about the same money, The JLTi, Swiss made, is tremendous as well, Audio Revelation has an in-home demo program. That's my 2cents.
I think I'd go with Sonofjim's advice. The 10.5 upgrade is not as urgent as the heavy platter and rim drive...both major improvements.