Look into the Hatch "Operator" line of gloves:
http://www.ustacticalsupply.com/hatchoperator.shtml
I got a pair of these tasty items about 4 months ago, and my god... I'm never going back to the standard ole uncle-sam issue !!!!e! The fingular feel out of the operators is so much better than the standard ones, its amazing... they feel thinner, fit better, and are more flexible... plus the little puff cuff keeps your wrist cooler and works super well when wearing a watch underneath (or pulling the glove foreward to see the watch). The leather on the palms is leaps and bounds ahead of the !!!! on the standard gloves.... Plus, its got the nifty little knuckle pad, very useful in protecting ones hands during a quick backhand to a passenger.
I think they're kevlar, not nomex, but 800 degrees F is plenty for me.
Definately give these things a shot... like I said, I'm a total convert.
-Mike