Here are a few that I have had so far and really enjoy:
Sutliff 515 RC-1- tangy sour red Virginia, apparently similar to McClellands Red Cake. My favorite bulk.
Sutliff 507C Virginia Slices - very grassy and hay-like Virginia, needs some age though.
Newminster No.400 Superior Navy Flake- very nice bright Virginia flake, has an excellent tin note to it. Smells like caramel. Says there is no topping but it sure smells like it. Going to cellar this deep.
PS402 Luxury Twist Flake - Lovely to look at and smokes well. Has a coconut-ish topping that is pretty unique, yet didn't grow on me, but still a wonderful sweet smoke.
Those are the only one's I've tried in bulk.
As far as I now, MacBaren HH Pure Virginia only comes in tins, and at the most a 1LB box, so it's not considered bulk in terms of what the bulk category is. Although, MacBaren Virginia No.1 does come in bulk.