I wanted to get into TIG and ended up after much research with an Everlast PowerTIG 200DV. (
http://www.everlastgenerators.com/product/tig-stick/powertig-200dv). It was the right price point for me and has been a great machine. It's AC/DC and dual voltage. It does a great job on steel and I've recently started working with aluminum. Haven't quite mastered the aluminum yet but I have no doubts that the issue is me not the machine. Still using the stock pedal as it seems to have good control.
My first welder was a Millermatic 211 MIG - great machine which I love, however if I had bought the Everlast TIG first I would have taken a serious look at their MIG.
Just as a matter of contrast I also have a plasma cutter - I started out with an Eastwood and wasn't pleased. I eventually sold it and bought a Hypertherm - no regrets there other than the initial hit to the wallet!