I looked at glacier tanks and they wanted almost $300 to ship Three burners to me, wound up shipping to Montana 40 mins away, it only cost $60. After their lack of help to get me a better shipping rate to my door, im less then enthused about going back to them to have to travel to another country pick up my stuff or get screwed hard on shipping.
As far as direct firing something this big, yes I'm worried about scorching, but it seems many others have gone this way, however I think I will be using a little more space between tun and flame then most people appear to do, and of course recirculate like my beers life depends on it cause it dose. Failing that I can always add something electric or another form of heat exchange, but i did that on the last one and for the amount i use it to make my simple little beers, I wish I had gone direct fire with recirc to begin with. However as always I do like other peoples opinions on other options for anything I do.