After brewing and tasting more IPAs than I care to count, I think I've found the combination that really does it for me. GUs around 65-70. IBU total ~ 70.
Chinook - 30 minute Hopburst ~ 40 -50% of total bittering units
Amarillo - 20 and 10 minute additions 30 - 40% of total bittering units
Cascade 15 minute and flamout 10 - 20% of total bittering units
Simcoe/Amarillo dryhop - to taste, for me , between .5 and 1 oz.
What is your favorite?