Hi Abo,
no problem, safer is of course the heavy duty one if you think you will have some big crashes - generally this is what the schools use as they have many different riders using them, so it´s easiest for them. If you think you can be a bit more careful, then the ION one, esp with mast protector below the boom, will work well too.
Ask at your local Fanatic shop or Importer re the nose-shields, they usually have to order them from our central warehouse, it´s not really an item that gets sold/held on stock by retailers, more for schools. Otherwise the ION one should be readily available.