what welding helmet to use

I weld about 8 hours per month average. I use a harbor freight automatic unit and hav no issues other than the window is about 2x4. Mabye one day I will buy a larger windowed unit.

Here is mine. It works perfectly for 4 year . I bought some replacement lens covers about 1 year ago. I just leave it out back in the weather on an outdoor shelf (not direct rain) and it held up perfectly so far.

http://www.harborfreight.com/adjustable-shade-auto-darkening-welding-helmet-46092.html

I would get a nice one for half price by buying used, if possible