Hi Andrew the mods I've done on my Mxl mics are brilliant I've converted one to a ribbon ,the other to a very good quality
Condenser mic . The Rode Nt1a sounds stunning . But favourite mic that suits my voice is the Mxl mic I've converted to a Neumann U87 style mic.
Wokka do try the positive grid demo gives you a great guitar sound without miking up the amp it comes with various amps mics and different sizes of cabinets and speakers .
Thanks
Kimball