Funny most recording studio professionals would take a miced amp over a straight line in any day of the week. For a rock metal sounding guitar the defacto standard is a Shure 57 mic.
next in your line up you would be concerned about a mic pre amp and then your A2D conversion. If you are using a line 6 I believe the A2D is better than a soundblaster.
As far as removing files one has to Destroy the file not just delete it. Under Clip.
Somecontrols disappear when the prog is not fully expanded