Within the week i want to replace my miller MIG welder (transformer went up my fault) with a Miller TIG welder. I used to enjoy using the many synchrowave 350's and the smaller dynasty (the one with shoulder strap) and my old work. I want to TIG 1/4 steel, aluminum, stainless, maybe even repair my buddies radiator leaks. should i go with Syncrowave 200 or dynasty 200?