Just saw this old thread on a search & wanted to give an owner's opinion of HTP.
I currently own an HTP MIG2400 & Invertig 201. They've seen daily use for three years without a problem. Never have hit the thermal limit on either.
Service from HTP is much better & faster than service on my Miller equipment. My first HTP MIG was the MIG240, and the arc-starts were never what I wanted. After using this machine for six months, I called & complained about this problem. The owner, Jeff Noland, offered to swap my older model for the newest model & charge me only the $80 difference. He paid full freight to return my old machine & charged only half the freight on the new one. Try that with Lincoln or Miller, especially after using their machine for six months.
HTP will customize their machine to your specs. Want a longer power cord, longer ground lead, longer MIG cable, different MIG gun, a special TIG control ... just ask. The cost is pennies when done at the time of purchase.
I have nothing against Lincoln or Miller, but HTP has service better than either of those.
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Barry Milton