Two questions...

first which roc viper is the best so far ?
also, i already have impact armor duke, and im goin to toys- r us on sunday and is hoping to get two figures ,a joe and a cobra, which two just go good together ? or fit together like a good combo

there is a few good figures out there if you can find them

Pit Commando
Helix
Storm Shadow Masked
Snake Eyes Paris Pursuit
General Hawk
Flash
Shipwreck
Deep Six aka Torpedo

Well you can never go wrong with a Snake Eyes/Storm Shadow set ... lord knows they have enough combos in this line so far lol. I think I am up to about four different versions of each.

i was thinking pit comando and neo or crimson viper (shipwreak is my fav joe)

Crimson Viper is neat too
and Ice Viper

Crimson Neo-Viper is awesome.

What particular "things" are you looking for? To display together? Or just two cool figures to buy?

I'd go Stone, having a new "face" in the Joe team is always good.

just cool figures sgt stone looks sweet btw

I would go with masked SS and Paris Pursuit Snake Eyes. A close second would be Pit Commando and Crimson Viper. Also like Troynos said you can't go wrong with Sgt. Stone and you could pair him with a regular Neo Viper.

BTW the Firefly figure is awesome and has a lot of really cool accessories!