You could try tons different amps to make sound you want - you know It's software emulators, like Line 6 POD but free or shareware.
http://guitar-software.info

Personal I like freeware from http://GuitarFX.Net - you can do deep experiment with multi-stage distortion and multi-unit EQs

List of combo making metal sound with mp3 examples:
http://guitarfxsoftware.com/combo.htm