Are you racing competitively at DH?
If not then you're not going to notice any difference between a 180mm Single Crown Totem and any other 200mm dual crown fork. Which is best is probably down to what you can get for the money you have (I have a set of Totem's on eBay right now that I would happily ship to Austria).
In terms of what bike, for trail riding in the Alps using purely uplifts, it's a matter of choice really. You could ride a big trail bike that weighs around 35lbs with dual ply tyres and tubes (I think the idea of a 'freeride' bike is dead these days; very little point in a non-DH bike that weighs 40lbs+ as you never going to pedal it anywhere meaningful) or a DH bike that weighs 40lbs.
The former is going to feel more manageable and give you more feedback and feel of the trail underneath you; the latter is going to feel more planted, stable and will allow you to 'get away' with more. You will ride faster on the DH bike but you might not ride 'better'.
The problem is that until you've got the DH bike thing out of your system, you're always going to want to have one. Spend a few years on the bigger bike, ride faster, make some mistakes, pay the price and then either get good enough to warrant riding a DH bike or trade back down for a shorter travel bike and possibly a more engaging experience.
DH bikes really do only come alive at much higher speeds and until that point, you're trading a lot of 'feel' and control for more travel and the ability to get away with more. It's a bit like an F1 car; doesn't really work at lower speeds.
Size is crucial and you should either spend a very long time thinking about sizes, comparing numbers to what you know already or you should test ride something.
The Nicolai Ion I have owned and it doesn't come up big, quite the opposite, they're quite small. The large is about the same size as most other manufacturers' mediums.
Glories used to also be quite small; Sundays are middle of the road. Socoms also, but the Socom is quite a highly strung beast with a relatively high BB that can make it feel a little bit of a handful.
Personally I think modern DH bikes these days are moving away from 90% of people can really ride. 63degree headangles are great when you're doing 40kph at Schladming, but how many riders outside the top 10% are doing that? It just makes the bike very difficult to handle at the more moderate speeds we ride.