First thing i would say is CHOOSE CAREFULLY!! There are a million and one heli ops in canada and some are better than others. Choose badly (CMH) and you'll have a week skiing 15 degree powderfields which you effectively "plough" right behind a guide with 8 other fat 50 year old gapers in one piece suits. Mica Creek, Bella Coola, Skeena Heli and Northern Escape all allow you (provided you prove to be a good enough skier) to hit some more adventurous shit. However, make sure you have realistic expectations before you go: don't think you'll be ripping Seth-style lines on 50 degree faces- if you're lucky you'll get to hit some real fun shit but don't expect them to let you charge around the hill willy-nilly hand picking your epic lines from the heli.
chck out
www.eaheli.com they'll be able to help you find exactly what you're looking for. They're pretty much the foremost heliskiing agents in the world and they know their shit! Take their advice, choose well and have the best experience of your life. Act like Butch Cassidy and pick a random heli-op out of the blue and prepare to be dissappointed!
It's your call, good luck!