New backup technology?!?!

I am attempting to get a budget approved for purchasing my first networkable autoloading tape system. However, I can make little sense of all the manufacturers and technologies; DLT, SDLT, ATL, VXA, LTO, AIT!!! Help! I have 3 servers and the biggest raid size is 70 gig. I am a one man shop and would like to extricate myself from daily switching of tapes. What technology/brands should I consider?