I found this thing at a pawn shop for 90 dollars, i think it's the step down from the 4000 thingy that is supposed to be so good. Would this be worth it? I'm currently using a RP80 but i need something more sutable for live gigs. Also, will it work well with a EH Metal Muff? Plz help me out i need to know tonite so i can go pick it up tommorow, we're leaving this town becuz we are just visiting tommorow.