I ordered, and just received, the books Chess Openings for White, Explained and Chess Openings for Black, Explained, both by GM Lev Alburt. I can't wait to start reading them. For the endgame, a dutch IM (Johan van Mil) told me Silman's Complete Endgame Course would be a good book for me, so I got that one too. But now you said Alburt has a great endgame book too, I might get that one after I finished these three beauties.
Thanks for the tip!