Upload & Sell: On
Ronny, I can't comment on HiTech, but I own a Lee system and simply love it. The filters are hard to find in the States, but checking a few vendors I usually can get what I want. Their 3-pack filter sets save you about a third on cost. That is how I bought my grad NDs and I picked up a colored cluster of three that way too.
Lee Big Stopper is phenomenal...just need to color correct the somewhat blue cast. Can't argue with a ~1000-fold brightness reduction in a light piece of glass. Circular polarizer is also top notch.