I have been reccomended that Buddy club IV cams work well with the longer stroke of a B20.
Or you could use the Spec III Plus cams which can be run on standard Type R valve springs. Mid range gains over Type R cams but not as good top end as the Spec IV's
Myself I have always wanted a set of Toda B's. Seem like a good all rounder.
But as has been said might be dependant on what CR you will be running.