Hi, I'm looking for some books on music theory.
I've completed the Musical Formation third grade at Oporto Music Conservatory, 4 years ago. What I learned there was: musical notation, rhythm patterns, intervals, how to form major and minor (natural, harmonic, melodic) scales, major/minor/aug/dim triads and triads inversions. I've also had lots of ear training (recognizing chords, scales, intervals, rhythm and melodic dictations and sight-reading/singing in different clefs).
With this training I believe I have a very strong foundation on the basics of music theory. However, I would like to enroll on a music theory course in the future, specializing on Composition and Orchestral Conducting (I would like to compose music for orchestra, actually

), so the basics won't be enough.
So, I'm looking for books on Harmony, Voice Leading, Counterpoint, whatever-you-think-would help. I'm not including orchestration or form composition books, because I think they should be used after learning harmony/counterpoint. The books should be comprehensive and complete (well, the most they can be), and with examples/exercises (for self-study).
I've already browsed the forums and the internet for books that would suit me, and I reached the following conclusions:
Books I'm considering:-
The Musician's Guide to Theory and Analysis, by Jane Piper Clendinning, Elizabeth West Marvin- Tonal Harmony, by Stefan Kostka, Dorothy Payne- The Complete Musician: An Integrated Approach to Tonal Theory, Analysis, and Listening, by Steven G. Laitz- Harmony and Voice Leading, by Edward Aldwell, Carl SchachterI've left out Harmony, by Walter Piston because some reviews said that it was too heavy. I'm more inclined towards the first book (The Musician's Guide to Theory and Analysis), it looks perfect for self-study.
Feel free to recommend more books and give your piece of advice about the one (or two if really needed, the books are expensive) I should buy.
Thanks.