My personal choice are Wesco Highliners.
http://www.wescoboots.com/wesco/stock.asp
Own two pairs now. (My personal preference is stock number 9710100.) First pair was bought in the beginning of 2008 and made it to the end of 2012. Guess what pair followed them... Yup identically matching ones. And when I can afford to I'll be sending my original ones back for a rebuild and wind up with virtually new boots for a decent discount. Much better in my mind over the throw away and replace that it seems many people have become accustomed to.
Typical usage has been many hours on concrete, very often oil soaked or antifreeze covered and slippery. Snow, ice, standing water, mud, etc, you name it, they go through it. They stay on my feet for everything, from the time I get dressed in the morning until I head inside for the night. Best thing one can do if usage will be similar? Upon opening said new boots, apply the entire packet of boot oil that should be included with the boots. Then, the important step. Apply 3-5 solid coats of Obenauf's L.P.
https://www.obenaufs.com/index.php?r...&product_id=30
Now, comparison wise. I tried several pairs of Carolina's first, then my first pair of Wesco's, and then a pair of RedWings. By far, the Wesco's take the cake. I've had lower back problems for some time. Heredity and being 'built' with a combination of long torso and short legs puts a rather large amount excess stress on my lower back due to the leverage. With these, greatly reduced and helps tremendously with lots of standing. They offer so much more support than other boots. These boots just don't quit.
The one negative; price. They are very costly. Roughly $400 for a pair like the ones mentioned. But with that in mind, the way I see it is that the cost will be justified by longevity (with minimal care) and comfort. Break them in and occasionally throw a couple coats of the Obenauf's and they just plain last.
Sorry for being long winded! I like my boots and I feel that they are an important part for those of us who work hard and need our boots to keep up!