I'm in Tech school right now, doing a two year program called 'Industrial Maintenance Technician', which I'll wrap up this May. I've done some basic welding: SMAW I and II, GMAW I, and now GTAW I, but I think I'm going to take the full welding program next year if I can find a way to work it in. Maybe night school. I plan to apply at several places where I may do a good bit of welding.
My problem is that I don't know enough to choose between the listed models.
The Lincoln seems like a solid choice, but Miller has recently come out with some new 'Clear Light' helmets that are very close in price, but also offer X-mode. I've already had trouble with welding outside, undesired dimming from shop neighbor's remote arc flashes, and getting flashed while using relatively low amps with TIG. X-mode should address all of those things, correct?
I think miller has just recently upgraded all of their digital helmets to 'clear light' lenses, but I don't know if they are all created equal as far as optical performance is concerned. Is the Lincoln still significantly clearer than the new miller offerings?
Also, Miller is currently running a $50 rebate on the t94 helmets, which would put the price withing $20 of the Lincoln, and the t94 offers X-mode, half-shade increments of adjustment, and side-view windows.
Then there is Optrel. They are a little bit more expensive, but the E684 and newer Lite Flip hoods have some kind of auto brightness adjustment that sounds like it would be great for low amperage tig welding. I think they only take proprietary cheater lenses though, and I often like to use cheater lenses for TIG, so that kind of annoys me.
I don't know if I'd actually appreciate any of the bells and whistles, or if I'd be just as happy with the analog dials on the Lincoln after all. It would be a lot easier to choose if I could see how an arc look through the various hoods, but that's not going to happen, unfortunately. It's really hard to guess which hood to buy.

Anybody have some sage advice for me?