Namaste Alchemical,
thank you for the post.
the chosing of a particular school of practice is something that one should do for themselves after spending some time investigating them. as such, i wouldn't be all that comfortable recommending a specific school at this point in time.
that said, you can get a very good historical overview of the 4 Schools of Vajrayana Buddhism as found in Tibet here:
http://www.tibet.com/Buddhism/index.html
here is a site that i have, personally, found very useful:
http://www.lamayeshe.com/
Good luck on your search, IMAHO!
metta,
~v