Just my .02, but drum corp wise, 27th has never been topped! Some guards looked tough (early Troopers), but nothing matches 27th in '79, which I consider the BEST. We watch that video at my house at least twice a month just for those riflers. What poise, stamina, class, toughness, and sheer power they had. WOW, I can't say enough about them. Watch for all the small things that are so military. AWESOME!!
For WGI type guards: My number 1 is the old Holly Hawks color guard. Ever see them? If so, you would have to agree...tosses, spins, both flag and rifle AND saber, were all in unison and thrown at the same height constantly. I've never seen that since.
2nd would have to be State Street Review
3rd - Cavaliers
4th - Skylarks
5th - Phantom Regiment (even going back to the early 60's)
6th- Blue Devils
Just IMHO. B)