those two items you have got will go together just fine
what is your head unit if you have one?
as for subs, most people hate sony subs, how ever i had the original penta12" and it was just fine for me
as far as it goes the 1200w 12" sony red is fine with a 300-450 watt monoblock amp, which should be able to give you ample bass for 300ish dollars
edit: 300AUS$ looking at the sony amps they look very over priced but on a budget i would get
http://www.sony.co.nz/products/produ...s/xsl126p5.jsp and look for a 300monoblock somewhere
the monoblock i was using was similar too
http://mobile.jensen.com/jensen/Jens...=POWERPLUS1150 previous model though, this one seems like a little to much bling