I recently bought a Line 6 POD gx to record my song/ ideas and what-not, but when I installed everything and ran the POD Farm I found out that their isn't a Heavy Metal Tone that I like. I know I can buy the Metal Shop add-on, but I don't know if it has what i'm looking for.

So I wanted to know what kind of mic I would need to record my amp through the POD gx or if doing this is a good idea.
With the Metal Shop add-on, I don't know what metal sound you can't create.