Upgrade RB300 Tonearm or Not?

I am still trying to generate a little more discussion on upgrade issues and benefits for the Rega RB300 Tonearm. I initated another thread earlier with questions about the best wiring, and I want to thank everyone who contributed to that... espcially Onetwothreego. I am hoping for a more feedback on this thread. The question is basically this: I figure if I fully upgrade an RB300, according to my plan (new wiring, i.e. Discovery Cable, Incognito, etc., VTA adjustment, i.e., Pete Riggle VTAF, etc., upgrade counter weight), I would have ATLEAST $700 into an RB300. Is this really worth it for the money, or should I take the $700 and put it towards another tonearm, even if I have to kick in a little more money? I will be using the tonearm on a VPI MKIV with the Super Armboard and TNT platter. I would appreciate any thoughts on this matter advising me for the best bang for the buck. Thanks and regards, Din Dayemi