I run Stroker Trails on my do all ht, not to many issues, but on any sort of DH, they fade wicked bad, even went out on me during a race run down Whiteface(one of the biggest DH mtns on the US east coast)
If you dont like your elixers you might look into shimano xt or slx, or maybe some formulas
agreed, Avid may have reliability issues (although both of my sets have been fantastic and I plan to buy a pair of 2011 codes) but Hayes is most definitely worse, I've never ridden a brake from them that I've liked.