Hey Albert - I have Steve Tibbets CD, "A Man about a Horse" which I keep going back to trying to "get it", as it were. I have enjoyed it more as I listen to it, but really had a hard time with it early on. Is it similar to the ones you've recommended? ECM consistently pushes the envelope and at the same time puts out some GREAT music. Are you a fan of Marc Ducret? If you don't know him check out his album "Detail" for some rather progressive improv fusion guitar. It's a superb recording as well. Interesting you bring this up; my wife and I were just talking about abstract art, poetry and music that doesn't follow convention. I think it's more difficult if you try to fit it into something you can understand. If you just let it wash over you and see what comes of it the results can often be surprising. It definitely requires allowing yourself to go out of a comfort zone. Another group I enjoy in that regard is "Rachels".
Marco
Marco