I've been using AHP Alphatig 201xd for a few months now. I had the AlphaTig 200 for 6 years before that. The unit was still going strong, but I decided to let a buddy "borrow" it and it got trashed transporting it. I scored the 201xd for $660 and its better in every way. Pedal, Torch, Arch. All around it seems like a nicer machine. Perfect for the weekend hobbyist. I built 3+ race cars with my last one on top of fixing a few odds and ends around the house. AHP all the way for the hobbyist!