Great Link, Dink.....
That link shows a pretty broad assortment of carts, and I'm sure each of us could find a use for most of them.
Peter's extensive modifications of the cheap basic metal cart shows just how useful we can make these things. Togol and I-Wire, in endorsing plastic carts, pointed out some of the things you need to consider, that might not be obvious.
The Akro-Mills "ProCart," with bins, looks to be quite handy. The ability to quickly break it down for transport is a big plus. But is it worth $275?
Rubbermade makes a unique cart, that has provisions for carrying a ladder...for $420.
The Milwaukee seems to be the cats' meow.. but with a base price near $800, plus extra for the wire reels, vise, etc... that's a LOT of money?
So how much would you spend? $100? $300? More?