I have been pipe welding for 25 years now, mainly shutdown and turnaround and I am thinking about rigging out. I will be working refineries as well pipe lines, so I will need a machine with a smooth tig arc as well as a smooth stick arc for running 60,70 and 8010 rods. Now I have used just about every machine out there and favor the vantage 400. I have been hearing a lot of good things about this miller big blue 350 pipe pro. I have used the miller pro300 and it welds ok. I am wondering just how much better the 350 pipe pro is. If anybody out there has any input about this machine please respond.