If you are in Germany you may as well travel down to Austria and get the A1 snow experience. Distances in Europe are small compared to Aus and public transport is dynamite. St Anton has a railway station and the chairlifts go up from it. St Anton is powder heaven!!!!!!! Not to mention, the trans-alpine railway line sceney is spectacular. There are plenty of resorts in the Arlberg to choose from.
You can use a normal snowboard for snowkiting, although some brands are bringing out dedicated boards, the main difference being there is no difference in the board shape from nose to tail. Normal snowboards are a little bit directional.
Sounds like you haven't been to the snow much. I reckon just go to Austria, learn to snowboard and maybe do some kiting when/if you get a chance. The best snowkiting is when you use the kite to access the off piste and as a substitute for a chairlift. You need a solid snowboard background to even consider this. Given you have a kitesurf background, you should be doing blues in 2 or 3 days. The concepts of board control are similar, except you are a lot more centred on your board, I would even say over your leading leg more, except when it comes to ungroomed powder, which has a different set of rules.
I love kiteboarding, but snowboarding in fresh pow on a steep black is the best experience. Imagine riding a wave that puts hardly any drag on your board and makes you feel weightless, whilst being almost silent.
The apres-ski (after ski) scene is awesome, people party on all night, its like Oktoberfest in the snow. People then go out clubbing until 3am and then hit the slopes all day the next day.
I am so jealous of you I want to steal your plane ticket.
