When I was looking at them a while back the one I settled on was the Lincoln Square Wave Tig 200 but it's a little more expensive than what you were looking at but you can't do too badly buying a lincoln or a miller. I didn't wind up buying it though. I already have a stick and mig welder and I can't really justify the cost for the rare occaision that I would need to weld aluminum.
Do you know how to weld? Whether you do or not, check out the YouTube channel
weldingtipsandtricks
The guy is an amazing welder and has videos about every conceivable type of weld you might need to make and also reviews of lots of welders.