We have a 21' tiltbed, 16' tilt with 5 foot stationary. It's rated for 12K, but I wish we had a 14K or even 16K. I think we're going to sell it and trade up, it's a good trailer but it's just not built quite right for what we're doing anymore. It's only a year old and I had to weld both the fenders back on yesterday, just cheap welding.
When we bought this trailer, we thought it would be too big for us, but we grew into it and now we need something with more capacity. I'm trying to hold off until next year when we get a class 8 dump truck, then I'll get a 20 ton tiltbed that will haul all of our equipment. Until then, our 277 maxes this trailer out completely with just a bucket and it's a bit too narrow for the 277. My advice is to buy the biggest trailer you can afford and don't look back.