ebay.... get a DLTIV drive and a bunch of tapes... for $200 i got adaptec ultra160 with a Dell DLT iV and 20 tapes. Takes a long time, but once it is done... it is done .
A good library such as http://www.quantum.com/am/products/atl/m1500/default.htm or something similar, around 5 to 10 tape slots should do you with a high compacitie tape such as lto2. Backups are one thing not to cheap out on, but don't overspend either, do researh on tape library's and see what you find out. We use lto tapes at my work and never had a problem with them.
Whatever you to stay AWAY from nctp drives and tapes, they really and i mean really suck, nothing but media errors