I'd probably rank it higher than you did given my love of everything Urasawa. One of the things I enjoyed about it is that one can actually learn something from watching this show. It makes every episode feel much more worthwhile than your average anime episode.
BTW there is a continuation manga set 20 years later if you're interested. It's called Master Keaton Remaster. Not sure where they got with the scanlations, but I am guessing from your other posts that you read Japanese pretty well so you don't have to wait like the rest of us do.
Interesting, I'd never heard of Remaster.
As for reading Japanese, not so much. I can understand spoken Japanese well enough to watch anime without subs (though I still like to have them so I can glance at them if I'm unsure on something) but reading is a lot harder, requiring memorisation of hundreds/thousands of kanji for fluency. I never got around to learning more than about 200 common ones. Unless of course the manga has furigana, in which case I can manage easily, as long as the raws are high quality enough that I can even make out the tiny furigana.
Agree about Seirei no Moribito, and it must be time to rewatch Ghost Hound - I can barely remember that show.
Two fine Production I.G anime IIRC.
I'm not sure I'd call Ghost Hound "fine" yet since nothing has really happened much in the first few episodes but I hope it is just a slow start, building up to something worthy of that description.