There's a few here, not had any experience but 3M is usually a good brand...
For the welding ones if you can afford the initial outlay I'd go for a 3M brand...
All ours are Esab Eyetechs - they get very abused but seem to put up with it OK. Battery pack lasts a full shift (providing you remember to charge it up ).
All ours come from Wellyweld, but not at the advertised prices.
Same as astro al, a good piece of kit. One tip though. If you buy off fleabay ask the previous owner if he has bad breath. Mine honked when I first got it.
They are great if you have to wear poxy reading glasses when welding, stops them steaming up. I bought it purely for fume protection but it also much nicer to wear, as it stays cool.
Esab I reckon, not big on speedglass stuff like yourself all looks a bit flimsy, I don't seam to get thirty seconds to myself at the mo, must ring round some usual suspects for prices.....