I just ordered on elast week off Ebay, the same Western Safety you speak of. I will hopefully receive it in the next day or so. I am NOT a professional welder, just starting out as a matter of fact, but I will certainly give you my personal opinion of it once I get to use it.
BTW, I paid $65 including shipping.
I have one of those. Works very well, but there are a couple of things I don't like:
1) I do mostly TIG and sometimes you get a flash that is faster than 1/20000 of a second. I doubt there's a auto-darkening helmet that's fast enough to shut out everything.
2) This particular model doesn't have a sensitivity adjustment, so if you have a bright light reflecting off of your work surface (mine is a sheet of aluminum, which is very shiny), it'll sometimes darken when you don't want it to!
3) The headgear is really cheap and dinky, and won't stay tight. My fix: go get one of the $8-12 or so regular hoods from Harbor Freight (one that has a good head-gear) and switch them out. I looked at headgear in a local welding shop, but just the headgear was around $25-30, so getting a whole hood and throwing part of it away was considerably cheaper.
All this said, I love the auto-darkening hoods. I'm a hobby welder also, and I couldn't imagine going back to a regular hood now!
Dave