$600 go pro stuff = $400 when you sell it. That won't cover you for a DSLR.
If you want to shoot DSLR save for the T3i, but I always have the attitude of "I've saved this much, what's an extra $300 for a better piece of kit" and I'd get a second hand 70D/60D. The reason for these two cameras is the articulated screen, you'll be able to get cool low down angled up shots without having to lie on the ground and still see what you're filming.
You'll also need a microphone because the inbuilt one is complete shit and any noise will get drowned out by wind, Rode videomic is the standard, plus a deadcat (not actually a dead cat, just a really fluffy thing that goes on the microphone to cut out the noise of the wind generated by you skiing). I'd recommend getting a cheap tripod over a knock-off glide cam - glide cams are overused and a tripod is more versatile. Also you can stabilise for follow cams with a tripod, it's just slightly more annoying.
Ignore the douche who says you need to learn how to use it, that is true but everyone has to start somewhere.
England is shit.