Welcome to the forum, inflikkt.
Personally, I'm of the opinion that making a fan sequel/remake to the discontinued series usually results in lesser game than an original idea (some people here would disagree). There are, however, exceptions which make the rule, and AGDI is certainly one of them. I think you basically listed all the upcoming projects that have the greatest chance to be such exceptions.
As for already released games, I haven't played them, but
Maniac Mansion deluxe (point'n'click remake) and
Space Quest: The Lost Chapter are two which have exceptionally good accompanying word of mouth.
As for the original games, some great indies off the top of my head are - in no particular order:
Apprentice 1&2,
5 Days a Stranger,
Pleurghburg,
Cubert Badbone,
Case of the Crabs and
Goat in the Grey Fedora. Also browse our underground section both here on the forums and
on the main site to find things that may appeal to you.
