I just replaced my hf auto dark with a Lincoln Viking 3350 and am very happy with my upgrade. My hf was starting to flash me more often than not. The big window on the Lincoln is really helpful when doing weird out of position welding. It's more $$$ but I think it's worth it.
Try cpooutlets.com. They have both new tools and reconditioned. I bought a recon Milwaukee drill impact combo from them 18 months ago, use it every day with no problems. The paint was a little scuffed on the drill but the impact looked brand new.
If you special order a color other than green while they're on sale be aware that you may be waiting a while. I ordered my blue 41" top and bottom on March 21st and my estimated arrival date is April 18th! They guy at the desk said this always happens when they go on sale. I'm not exactly...
I've got a pair of Keen Industrial Clevelands that I've had for almost a year now and just had to replace the laces. I've been extremely happy with them and would highly reccommend them. Big toe box so I don't ever have an issue with steel toes digging in or being a nuisance...