First off, my equipment is as follows:

LTD-351D
Metal Zone Distortion Pedal
50(ish) Watt Marshall Amp

I need to get my distortion to be chunky with my palm-muting, be able to clearly understand the notes, and have a smooth feeling all the way around. Using bands as a example, I want something that sounds like the Undeceived era of Extol mixed with the And Justice era of Metallica. Any suggestions?