I've got a 1999 Subaru Impreza 2.5RS. (It's not a car I want to put a huge system in) Currently I have a Pioneer DEH-P4100 head unit, Infinity Reference 6.5" separates in the front and Rockford Fosgate 6.5" coax's in the rear. No amps. I don't want to go the sub route because 1) money and 2) I need all my trunk space. So I'm looking for a good cheap 4-channel amp (like Profile, JBL, etc) to power my Infinity's up front along with a hard hitting pair of 6x9's in the rear. For the amp I was looking for something that had adjustable bass boost and around 50w per channel of power. (JBL, MTX Road Thunder, Phoenix Gold Octane, Lanzar, Profile CL series, etc.) For the 6x9's I was hoping to find a set that hit very low (darn near sub level). I realize that basically they will be free-air so I know they won't hit like a dedicated 10". But it will be better than my 6.5"s. (Pioneer seems to make a nice 6x9 but I just don't know about any others). Any ideas or suggestions for an amp and 6x9's?