Help deciding on my next series

Save some more money and buy both since they are both awesome!! =3

Go with both (Sorta) Watch Cowboy Beebop, and watch Evangelion: Death and Rebirth. Evangelion Death and Rebirth is basically all the episodes (and some of the movie End of Evangelion) summarized and compressed into two movies that last a bit over 2 hours combined. It would save you time and money.

Bible Black.

Eva is somthing more than an anime, its kinda heavy, if you are not into psychological bullshit, take CB.
Spike is really cool, decent story and epic ending. 100% classic.