your first option is better than the 2nd, the Kappa 50.5 cannot performance its best w/o an decent amp. plus your HU power alone are not enough to run any component set.

you can try these Arc Audio, sound pretty nice and at a low price:
http://www.cbrstereo.com/index.asp?P...ROD&ProdID=993

and PG amp, give a little bit more power and at alpine level or even better:
http://www.cbrstereo.com/index.asp?P...OD&ProdID=1019

Those are $218, leaving you some left for wiring kits, speaker cables, and little bit for sound dampening!
stinger wiring kits
http://www.cbrstereo.com/index.asp?P...ROD&ProdID=840

sound dampening for door panel:
http://www.cbrstereo.com/index.asp?P...ROD&ProdID=836

Hopely that give you some more choices....
Iknack