I haven't seen too much negative about the Lincoln helmets. I doubt i'd go with a cheap one. I like the idea of the Miller X-Mode but their helmets seem to have short lives. That one low cost Lincoln stood out to me as most of the cheap helmets have higher minimum TIG amperage ratings. I'll take a closer look at the Jacksons. The Optrel helmets are some I want to consider too. If the outside lens covers are for protection, I take it that the inside lens covers are an easy way to keep dust and dirt off of the lens without having to wipe it down. I wasn't sure if they had any other purpose other than to protect the lens.