Come now, old thread. Rise from the dead!
Hahahahaha!!! It's alive!!!!
I recently broke one that was very similar to the light one shown above when I was trying to get up the stairs to the J train with two Bergie 12's (well under the 200-lb limit), my backpack (with my amp) and my gig bag. The whole bottom plate just snapped right off and I had to hand-carry the cabs the rest of the way home! Not fun. That's when I started looking for a mostly-steel one.
The one I got was from Link Removed
I was looking for a sturdy cart that was made of steel and I found one there for a good price. Meanwhile, reminding me of just how lame marketing has become, some carts labeled 'all-steel' or 'steel' still have many key components made of plastic. When I used to own a car and drive to my gigs in the Midwest, I could get away with using the reinforced-plastic carts just fine because most of the load-ins were pretty short and flat and there would usually be an elevator if we had to get to another floor.
Now that I often negotiate the subway, its stairways and the myriad other load-in nightmares lurking in the city, I feel that steel carts win out in the end. Nothing against the lighter carts, I just don't feel they can take the beating and the repeated torque stresses that steel carts can.
On a side note, I've bought tons of stuff from B&H over the years and I recommend them highly.