Grellas:
You mention the preference order as:
1) unrestricted grants
2) restricted stock at a cheap price with a timely 83(b) election
3) ISO, with low strike price and early exercise
4) ISO or NQO without 90 day tail on termination
5) RSUs
How do ISOs with a 90-day tail on termination compare? If I understand correctly, those are the most common.