15mm Plastic Soldier Company (PSC) Cold War Soviets .. Basing Conundrum

Darn those boys and girls at PSC they should not make WWIII Cold War NATO versus Warsaw Pact so "interesting" with their plastic kits. My impulse buy of 141 plastic WWIII Soviet Infantry leaves me with two problems (for under £20). The first problem is "how to base" the infantry on the assumption there will be a generic rule-set to use. People have implored FoW and Team Yankee style basing (see below, right hand the "rectangular squares") or to be maverick and just use the bases I picked up from 'The Works' (see below, left and the various sizes of circles). I have already been forewarned that I would be "black-balled" from playing FoSW/Team Yankee if I chose such a "heresy" [shades of 40K and Horus here ;) .. PS: I literally know nothing about 40K, so I am really faking it here]. However I have the crazy thought of doing Retro-Modern Chain of Command in 15mm, so they would be individually based or use the recently acquired WRG 1950 to 2000 Battalion Wargame Rules, which seems to fit with the "circles"(see below: my dilemma - note everything below is "temporary" so I have not committed):

The second problem is Soviet vehicles. They have lots of them. I have been told ten T-55s and 12 BMPs or BTRs, plus a Shilka and "bits and bobs". The infantry was a nice buy but spending another £80 on vehicles was not what I intended.