I've ordered Jackson blocks a couple times now. I've found the smaller Jackson blocks perfect for quick studies, practice, color checks, etc. The price is cheap enough on the smallest blocks that I just have them around the house, at work, in the car, I can pencil sketch something to paint later or whatever. Versatile.
I've been painting "real paintings" on Baohong lately, specifically the rolls. The price seems good for the quality/quantity but requires me to stretch the paper which I don't like doing so we'll see.
Might be your paper, getting an even wash has a lot to do with your paper. Your technique might be good but wood-pulp paper is tricky to get an even wash.