I have two pair (different colors) of Durango DB594 motorcycle boots that I just alternate almost every day for the last couple of years...if you don't wear highwaters then they look good enough to wear in a "business casual" work environment. Just had one pair resoled for $24, so very economical in my opinion. They're really comfortable, IMO.
A quick google search found them for $79 at footlocker:
FootLocker - Durango DB594. I think I paid about $100 at Cavendars for each pair and would do it again.