Re: New Sax
check out classicsax.com there is great literature there written for saxophone. as you will notice, most of it, nearly all, is written for alto. thats why classical professors want you to play alto. i speak highly of alto because after i picked up bari in 8th grade. i didnt play alto again until my senior year. now i play alto most of the time. i consider myself to be a classical alto player. however, i still play bari and i recently purchased a pro series tenor which i play.
as for what specific classical music to pick up, i cant really say, not having any idea of where your at. 2 pieces you shouldnt have problems with are both bozzas and iberts arias. they are both standard and great pieces. look into what they list as "easy." they carry music through what people will play when they are in graduate school, so dont feel degraded that you are playing "easy" music. also look into getting copies of both the ferling etudes and voxmans selected studies. they are both standard books for the saxophone. many of these exercises will appear overwhelming, just take it extremely slow.