I'll add my 2 cents worth about HTP as well. . . .
I have an Invertig 201 with the water cooler package and 25 ft torch leads. I spent most of my time driving a Synchowave and was very happy with its performance, but couldn't afford to lose so much space in my garage at home, plus the cost of upgrading my utilities to support it. Instead, I decided I should try to buy a nice inverter based machine. I had originally set out to buy a Miller Dynasty 200DX having already owned a Millermatic 210 GMAW/FCAW machine. I was shocked at how much higher the Dynasty was (pricewise) versus the Synchrowave. I talked myself into justifying the price based on the portability aspect of the Dynasty, and went about looking for a deal. As it turns out, even the best price on the Dynasty is pretty damn high, especially considering this would be a non-commercial machine. I found a low hour used one from Redi-Arc (or one of the other welding rental places, I don't remember) and pulled the trigger.
Shortly after I "ordered" my Dynasty, I was informed that it had been rented out again, and that they could either return my money, wait for it to come back and ship it to me, or they would substitute another (older) machine. I decided it was best to just cancel the order. Sure glad I did.
One of my customer friends had shown me his HTP Invertig some time before that, and was delighted with how well it worked. He too was used to using the bigger Synchrowaves at work, and said he had zero regrets. So, I decided to investigate HTP, found that I could buy the entire setup cheaper than I could buy just the Dynasty power source, etc. Made my order, a few days later had a new machine, everything has been great.
Now, the reason I'm glad I didn't buy the Dynasty isn't just because of the difference in price. A gal I know who bought a Dynasty a year or so before I almost bought mine had it shoot craps just outside of its warranty. Miller wasn't very helpful in resolving the issue. The technician at my LWS has told me on a couple of occasions that I've asked that they have had a lot of problems with the Dynasty machines. Still, he recommends them over the other inverters (no doubt because that's what they sell.

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Anyway, I think the HTP stuff certainly deserves a close look. YMMV, but I'm very happy with mine.
BK