I'm with just about everyone else...all the video's listed are good systems.
Since you mentioned not wanting/unable to do the math or memorize a bunch of numbers, I would not recommend the Jimmy Reid videos. But I must say if you take some time to watch/learn his systems, it becomes much easier down the road. I would invest again in the "Almost all I know" set. Every time I watch it, I learn something I didn't know before.
If you go the route of Grady, the Finer points of banking and safety play might be best for you. I would follow it up with Only Kicks, in which Grady goes through most of the same material, at a faster pace and talks about a couple things not in the Finer Points. "Finer Points" was the first video I watched on diamond systems, circa 1997, and the way he presented everything really clicked in my head and the pieces fell together well for me.
I would say I got more out of these three video's than I did out of the monk 202 series and lil Joe's video. However, I did learn from these, but not nearly as much as the previous ones. I do own all of these however, and go back to them all from time to time, and I really hope Joe does get Vol 3 of Pool IQ complete sometime in the near future.