check out
www.massif.com
excellent nomex clothing, use it for winter heli-skiing and summer work. Elements jacket is a great all-purpose jacket and is pretty well waterproof - bib overalls work in conjunction for winter work. Lots of options for layering - also it all stretches, great after too big a meal.
They have a new flightsuit line - haven't tried it yet. A bit costly, but the quality is worth it.