The Chemical Wedding is pretty fucking unbelievable. Start to finish it's his best solo work, and among his very best work period. But, I will say there are songs on Accident of Birth that I like better than any one particular song on TCW. "Freak" just kicked me across the room the first time I heard it, and "Darkside of Aquarius" is amazing. Back to TCW, my favorites would have to be "Jerusalem", the title track and "Book of Thel". What a marvelous piece of work. Themed but not purely a concept record....just done damn right.
I read mention of Skunkworks a few replies back, and I agree it's good too. I think it gets a bum rap because it's not a metal record per se. I think the closest thing I could call it is progressive heavy rock, or modern rock. It's just so much more intelligent than anything else "modern rock" though. Regardless, "Strange Death in Paradise" is epic bliss, and "Back From the Edge" is killer too. More people need to check this album out and give it a chance.