I might want to make a song that has just power chords and some shred. but before i do that i need a little of help. can i play any power chords i want or does it have to be in a certaint key? and do i have to play the solos in a certaint key?

You don't need a second thread.
Someones knowledge of guitar companies spelling determines what amps you can own. Really smart people can own things like Framus because they sound like they might be spelled with a "y" but they aren't.