I have not run them at all, but the Thermal arc 186ac/dc tig machine looks nice. It is a low cost way to get pulse, hf start, foot pedal or fingertip amptrol and pretty good adjustment. That might be the route I go while I save up for a dynasty.
If the 186 is as good as the 185 was you will rethink going to a Dynasty 200.
Now upgrading to a 280 or 350 is another question.