Honestly, any aftermarket brand will sound better. Infinity, Polk, Pioneer, Alpine, etc... Just get a pair that that has a good RMS range. My Infinity's run from 2 - 90 RMS. This way they will sound good if you choose to run them off factory or aftermarket amp. I started with just factory amp but than choose to add an aftermarket a month later. Once you here the improvement leave yourself the option to increase the upgrade even more.
2009 F150 FX4 SCrew 4x4, 5.4L, 3.73