I won a 530 in a contest here on BF a few weeks ago, its a fantastic heavy duty build on a light use slicing knife, the one thing i would say, is that seeing as you are a construction worker, it might be a bit thin for anything more than light slicing
if you want a knife thats almost as light with the same cutting power, the 555 minigrip or 550 griptillian from benchmade are both fantastic knives for that kind of use
if you really want a workhorse, there is no better knife that i have handled than the MANIX 2 from spyderco, at a mere $80, its one of the best built knives ive ever handled, i use and abuse mine miles past the point that any other knife would have failed, its really worth checking out
Cheers!
The Colonel