I don't own any of them, but your question begs the reply: WHY aren't you considering Passon?
Better hydraulics? Passon uses stock clutch linkage. No changes needed. Passon uses a stock bellhousing.
Better crossmember? Passon bolts in in place of the A-833. No crossmember changes needed.

You cannot say that about the others.

Board members are driving Passon 5-speeds right now.

So why don't you go that way?

R.