Really good stuff, mate... I'm from Brazil myself and indeed when you think in terms of brazilian musical contribution and evolution these two names (Jobim and João GIlberto) undoubtedly come to mind. Two giants not only in understanding the guitar but also in comprehending music in general, they performed several incursions throughout music theory and history in order to create a very unique sonority in guitar (not to give them all the credit, of course; names such as Radamés Gnatalli, Chico Buarque and Garoto - to mention but some - should be brought about here). One may seclude oneself with a guitar, paper and some Gilberto discs for months on end intent on studying his peculiar voice leading and chordal configurations, and one would definitely have at hand loads of new colors for one's improvisational and compositional color palette, whether interested in approaching "classical music" or otherwise. Truly, if you have some time to spare, try playing, writing down and understanding what this man did on our beloved instrument. You'd be surprised.