Ok, I'm kinda deciding on whether to buy a processor or guitar if I save up about 18k, because if I start giging soon I'll definately need a good processor, and my givson isn't so bad after a few tweaks. So for under 20k what is the best processor available? The best processors right now are the Boss GT-6, Boss ME-50, Korg Ax1500g, right? The digitechs are all expensive. Which one is the best? I mostly play early Metallica and a little Megadeth. How does each cost?