Burners for my system?

Ok so Im about to purchase either of these burners here's the url's which is better? http://www.agrisupply.com/product.asp?pn=40282 or http://www.agrisupply.com/cast-iron-burner/p/30295/cn/5400000/ or http://www.agrisupply.com/product.asp?pn=64494

I ordered the banjo bg14 burners yesterday!

If your doing smaller 5 gallon batches the large 10" dia. sized banjo burners are hard to regulate at lower settings once your wort boils, and may even blow out. The smaller 4" burner ($8)170,000 BTUs would be better suited. The only advantage of the 10" dia. 100,000 btu burner is that it will deliver the heat more evenly across the bottom of a pot. Is that a big advantage for boiling? Or to justify the extra cost ($30)? I could see that it would be an advantage for even pan frying or deep frying. That could be open to discussion. The more btu's = the faster you will be up to a boil. High pressure burners are for boils. I would stay away from that low pressure 6" 70,000 BTU model which is better suited for cooking and camping. My pick for boiling would be the 170,000 BTUs, 4", High Pressure model. Banjos are all show and no go for boiling. IMO