Ok i decided not to buy my friends pile of subs and looked around on CrutchField for sum...this is what ive come out with so far
2 x Rockford Fosgate P1S415
Punch Stage 1 15" 4-Ohm Subwoofer
Rockford Fosgate P1S415 Punch Stage 1 15" 4-ohm subwoofer at Crutchfield.com
two of those for $150...good deal saving $110 and good subs according to alot of ppl.
Now i need to decide on an Amp !
and i cant decide..
so ima list a few that I think arent bad...but i dont know much about all this crap like channels, RMS, Ohms and junk....so help me out...
I also got a friend here whose good at all this so he'll tell me what he thinks too...
Rockford Fosgate Punch P2502 2-channel car amplifier 60 watts RMS x 2 http://www.crutchfield.com/App/Product/Item/Main.aspx?g=120&i=575P2502&tp=115 Rockford Fosgate Punch P325.2 2-channel car amplifier 80 watts RMS x 2 http://www.crutchfield.com/App/Product/Item/Main.aspx?g=120&i=575P3252&tp=115 Rockford Fosgate Punch P200-2 2-channel car amplifier 50 watts RMS x 2 http://www.crutchfield.com/App/Product/Item/Main.aspx?g=120&i=575P2002P&tp=115 Rockford Fosgate Punch P400-2 2-channel car amplifier 100 watts RMS x 2 Rockford Fosgate Punch P400-2 2-channel car amplifier 100 watts RMS x 2 at Crutchfield.com Im sure the last one is what alot of u guys are gonna say....in order to pump out more power....but yea....what u guys think if theres any other kind of amp out there that u think is beter for below $250 or so.....let me know...i listed those cause they're all in the same brand as the subs... so thanks in advanced for all the help 
P.S.
dont forget these are gonna go into a 94 Ford Mustang hehehe.....Im planning on building a cutom box thatll be tilted..so yea