I own a AL140 with duals.
I debated between the 140 and the new Ditch Witch sk755 and was having a tough time deciding what to get. I pin pointed down what aspects that I really wanted in a machine, it had to be able to deal with wet ground, fast travel speed, and lift capacity. I am so glad I bought the 140, I kept my boxer thinking that I might use it and I haven't touched it in a few weeks. It has probably only gone on 1-2 jobs since I got my 140 in August. The only thing I am keeping my boxer for is when I split crews we can each have a forwarder.
The Gehl knockoff is highly embarrassing, I wouldn't even consider it. It looks like a very cheap version of it. (I saw it and looked at it at TCIA)