Well if it's $1100 that's basically a wash. I'm not trying to say whether Donek or Virus is the better board, just that at the level of riding you've indicated you're at, you're not going to feel a difference between two premium boards like that, so you may as well save your money. I'm not trying to put you down here at all, just giving it to you straight.
Now, your statements are conflicting. You say you want to get into Extreme Carving, but you also say your trails are too narrow for it. I think you should master that 12m Nidecker you already have before you go dropping 4 figures on any new board. A 12m sidecut can be carved on narrow trails, under the right feet.