HTP or Miller are the good choices IMO. Millers educational support and parts availability is more convenient. HTP is pretty much mail order and educational materials are basically worthless compared to Miller. That said it's just a MIG and you've got experience so the HTP price is the hook. I have no complaints with my HTP 200, I just make sure I have back stock on proprietary consumables.
Regarding the TIG vs. MIG debate...............the preparation and cleanliness required for TIG vs. the speed of MIG can make the decision easier when you just want to stick two pieces of metal together.
