I bought the 2-ton model from HF on sale for less than $200. I have pulled my cab, original engine w/trans and set the new one as well. It is the fold up model w/6 wheels. I can tell you this it went together without a hitch it doesen't bleed off under load and I have had no issues with its ability to do the job. Here it is in action along with the load leveler that HF sells. I don't love them for everything but this was a good deal.
http://community.webshots.com/photo/2887714350102454676ezrFzq