I'll ocasionally go to something like a Salomon Quest 4D, but the majority of the time use a trail runner.
This is my current favorite:
http://www.sportiva.com/products/footwear/mountain-running/crossover-20-gtx

Trail runners definitely aren't for everyone but the I've packed 130 lb loads in very rugged terrain using them. With a set of MicroSpikes and trekking poles I'm good to go.


Ed T