If you just learning, I suggest the classic pass.
There is no need to add in dribbling the cards or riffling the corner while learning the basic mechanics. It just makes the move more "obvious." Learn the classic and learn it well. Do it until it is not only quick and invisible, but also motionless and silent.
Then you can add in spreading the deck or dribbling the cards.
However, if you need a pass for a routine, and there is no other way to control it, the turnover pass seems to be the easiest. Just work in front of a mirror for an hour or so to manage angles and get it looking right, and you'll have it down. Turn over the deck without the pass, then with the pass. Strive to make them as similar as possible.
Good luck and don't get frustrated. It's taken me almost 3 years to get my pass where it is.
EDIT: For the record, I am a HUGE fan of Trespass. It is killer. Bottom line.