I have a decision to make that must be made rather soon: I've been craving a Thumb 6 BO for some time now, but I've been on fours for the past 6 years. I just found a neck-thru Thumb 4 for a great deal, and need to act fast if I'm gonna go for that! What should I do!! I play mostly ska/punk/rock, so I really don't know how much I'd use the extra string till I got really comfortable with them, but seems like it would be a good option to have. I am only 18, so those 6-strings will be around when I'm ready, and this 4 is an awesome deal, but I dunno. HELP!!