If you get the Slipstreams, you have two size choices - 16x7 and 16x8. The 16x7 wheels come in two offsets - 40mm and 45mm. You'd want to get the 40mm (from this post -
Rota slipstreams for a 2g and tire size?). If you were to get the 16x8, it only comes in a 48mm offset, and I believe you'd have to get wheel spacers to work with that offset (as well as have a stiff and high suspension).
If you get the Subzeros, you have only one size of 16x7. They come in the same offsets as the Slipstreams (40mm and 45mm). And I would think the 40mm would still be the way to go.
And the 3rd Gen RX7 wheels look to be 16x8 with a 50mm offset. According to this thread (
http://www.dsmtuners.com/forums/hand...-pictures.html), you'd need spacers and most likely longer wheel studs as well.
Slipstream - 13.9lbs
Subzero - 14.5lbs
RX7 - ~13lbs
If you want something light, go with either the Slipstreams or RX7's.
If you want something everyone has, go with the Slipstreams.
If you want something different, go with the RX7 or Subzero's.
If you want something wider, go with the Slipstreams or RX7's.
And you can look at those two threads to see what tire sizes people are running. Or just search the members (in the Mod: Handling box) for which rim you're interested in and check what tire size they have listed.