The pirranah is a great little torch. It's capable of getting much much hotter than a minor and still runs on a lot less oxy than a GTT. If you were doing boro only (and not on a concentrator), I'd say go for GTT (I friggin love mine!), but if you are wanting something to possibly do both, I would suggest the pirranah. It will do it all. I will be setting up those for my teaching studio... I have really fallen for them in the past year.
I really don't like the minors... They aren't very hot in comparison and the flame isn't all that adjustable.
I hope this helps...