So, I did a little searching for "Best Cooler" and was amazed at how many companies make high end (expensive) coolers. Here is a list of the manufacturers I found, all of them are similar to the Yeti brand in construction and style. It must be a profitable business if so many people are making them!
Grizzly Coolers
http://www.grizzlycoolers.com
Canyon Coolers
http://www.canyoncoolers.com
Icey-Tek Coolers
http://www.icey-tek-coolers.com
Engel Coolers
http://www.engel-coolers.com
Moeller Coolers
http://www.moellermarine.com/aftermarket/ice_station_zero_coolers/
EvaKool Coolers
http://www.evakool.com/home
Frigid-Ridgid Coolers
http://www.frigidrigid.com
NRS Coolers
http://www.nrs.com/category/3220/rafting/coolers
Yukon Coolers (Igloo's high end cooler)
http://www.yukoncoldlockers.com
Brute Coolers
http://www.bruteoutdoors.com
Orca Coolers
http://www.orcacoolers.com
Pelican Coolers
http://www.pelicanprogear.com/items/coolers/
Yeti Coolers
http://www.yeticoolers.com