As for Nextec Epic, a silicon-impregnated fabricwell, I flat don't like it. The pieces I've worn simply didn't breathe very well. Better to go with the PTFE Lite shell, which is similar to Gore's DryLoft material.
MEC's Frobisher is also a fine parka, and at a current price of $336 U.S., it's also a bargain (www.mec.ca). It's a long-cut parka, like the Icefall, with marginally lesser down-fill (700, versus 750 for Feathered Friends) and features similar to the Icefall. Plus, it has a DryLoft shell, which isn't waterproof but is good at keeping the down dry when things like snowmelt are an issue. Strictly on price, the Frobisher is the way to go. Otherwise, my belief is that the Icefall or Frontpoint are slightly better made garments.
Have a great trip!