Out of the three mentioned I vote for the prophecy as well.
The proph sounds better imo then the venom and the synth
engine is flexible enough to keep you experimenting.
yes it has menu diving but i doubt a primarily in the box user
will be bothered by this. Personally I have never heard anything
from the op-1 synth wise that competed with either the prophecy or venom.
If you are by a guitar center they should have a venom for you to try out.
The venom is not a bad machine it is just chained to software to fully use it.
Plus they are quite cheap these days.