gotta ask being from a tropical climate in northern australia i want to know if this would be good for a month long snowboarding trip to canada (big white) any suggestions to gear would be kindly appreciated!!

I'd say it can be done (with proper layering of course), but couple of things to consider. The Gore-Tex active shell is being marketed as a lighter and more breathable (but still waterproof) garment targeted for high aerobic, "done in a day" activities, such as trail running, mountain biking, and fast alpine ascent. Traditionally, the Pro (most rugged) and Soft (soft and warm) shells have been used for ski/snowboard outerwears (I for example use Arc'teryx Sidewinder AR, the pro shell, and Orage Retallack, the soft shell for skiing) if Gore-Tex is indeed one's choice of garment for such things. So one question to ask yourself is what kind of skiing are you planning to do? Will it be mostly front side, backcountry, park/pipe, combination of? I'd recommend your final choice should rest on the level of "wear and tear" you plan to put on the equipment and how much you care about the longevity of the equipment. Additionally, the alpha fl is a pretty spartan jacket with only 1 pocket on the chest (which is why I bought it for trekking/backpacking in an effort to keep my total load as light as possible), so the question is whether that is enough or will you need/desire some additional amenities from your jacket? Lastly, this jacket is cut trimmer (including the arms) than other Arc'teryx shells I've had in the past, so for layering, may want to size up.

It's a great shell for Canadian skiing, but you'll need another layer to insulate. Look into synthetic insulated jackets and fleeces.