As far as a helmet, I think I can help. Auto darkening helmets that use a battery back up and have adjustable shade and sensitivity adjustments/grind mode are worth the extra money. If you shop around you can find them quite reasonable and not much more money than the solar only helmets. In fact you can buy a good auto dark helmet for about the same price as just a solar auto lens insert. Find a supplier who is a member of the IWDC and look for a Weldmark branded helmet. They are reportedly made in the same factory as Miller and designed by the same person. Don't take this as gospel, just what I was told. The standard view helmet is around $100 but they have a new digital one that just came out with a larger viewing area that is around $200-$225. I'm not sure about the new one but the standard view helmet uses AAA batteries you can buy anywhere. I think it's about the best deal for a helmet I've seen. I think they have a 3 year warranty as well and we've only had 2 come back in several years.
Wow! I just looked on the net and see them for $75 for a black one and $84.95 for flames. Very good deal in my opinion.