FearfulSymmetry: Thanks! I'm new to Tex Murphy, but if this turns out well I'll probably get the other ones too. And thanks for the recommendation, but I'll probably be fine without subtitles. :)
If you should like the style and characters of the game but should not like the relatively short playtime or few puzzles be assured that the old games have far more puzzles to solve and especially pandora directive (imo the best) has a pretty long playtime. Of course the FMVs in the older games are not that great as they are in this game but I love all of them. Oh, and since you are new to Tex a short list: of all the games:
Mean Streets + Martian Memorandum (oldschool Adventures without much FMV)
Under A Killing Moon (First "real" Tex game with FMVs and Chris Jones playing Tex Murphy)
Tex Murphy: Overseer (Pretty much a retold FMV version of Mean Streets but continuing the story of UAKM)
Tesla Effect: A Tex Murphy Adventure (resolves the brutal Cliffhnager of Overseer but strangely works without even knowing any of the previous games)
To experience the best of Tex it would probably be enough to start with Under A Killing Moon since Mean Streets is retold in Overseer and Martian Memorandum has not much to do with the later games.
If you REALLY should fall in love with the characters I strongly recomment to read the books written by Aaron Conners who also wrote a Tesla Effect Book.
Happy investigating :)