What Cams Can I Get?

[blageo23]

Here is the deal, I need some cams that will work with stock springs. I am going to be building a head with nice springs and valves and whatnot but until then I NEED cams but dont want to switch out the springs. I need to know whats the most aggressive cam I can get on stock springs? Really Im just looking for cams that are better then stock, can use stock springs, and that are cheap or that I can find used for cheap.

2.4l
20G turbo
Stock head