Man, get the best one you can afford! I am in the same dilemma over a 200DX or a 350DX. I think I will go ahead and scrape together the coin to get the 350DX and the complete TIG Runner and Torch package.

I don't think my little shoppe will ever outgrow the 350DX but some heavy trailer frame and chassis fabrication might be a little much for the 200DX. Plus you get much more control over your processes with the higher end machines.

I don't think you can go wrong with either machine and as a bonus, they will both run off of a 220/50A circuit.

Enjoy!