So I recently pulled the trigger on a Bugera 6262 head and (as mad as this sounds) it doesn't have enough gain for me (despite all the reviews saying it has "more than you'll ever need.") Either that or the head didn't come perfectly biased or the tubes are already dead. So I'm looking to boost it up a little ... I've read good things about Tubescreamers and stuff but I don't know which pedal to go for. I will be using it for 7 and 8 string Metal.