TecArc and portamig are near enough the same machine, portamigs starts @ 15amps whereas tecarc starts @20 amps. Do you need 15amps, I personally dont think so, + portamig have smoothing capacitors that won't do much at the lower end of the scale so I don't see the need for them either. £ for £ I would just buy the TecArc Machine especially if you are only going to be using it for thin work.I've researched,researched and researched and am convincing myself to spend the money on a portamig 215. I have looked at the tec arc 211 which looks like the same machine but cheaper. I will not be a heavy user of the mig so am trying to warrant the extra spend. Any views tec arc mig welders.