CHUB, I PURCHASED AN HTP200 INVERTIG AND AM PLEASED WITH ITS PERFORMANCE. I HAVE USED IT FOR BOTH TIG [ALUMINUM,STAINLESS AND MILD STEEL] AND STICK AND HAVE NO REGRETS. UNFORTUNATLY I CANNOT COMMENT ON THE DYNASTY, I NEVER USED ONE; HOWEVER I HAVE A FRIEND WHO HAS ONE AND SPEAKS WELL OF THE MACHINE. I HAVE SPOKE TO INDIVUALS WHO HAD THE OPPORTUNITY TO USE BOTH AND SAY THEY ARE QUITE COMPARIBLE IN THEIR RESPECTIVE RANGES. GOOD LUCK IN YOUR CHOICE CHUB. SONNY