A few reasons why I think we'll do well this weekend.
1. We're in better form than the Welsh, who peaked in the Autumn.
2. We have a great record in Cardiff, I think we've lost once in the last 25 years there.
3. If Wales want to win the Championship, they have to win by 13 points. That immediately puts them under pressure to play a more open game than they have been playing under Gatland recently. ROG can sit back and play for territory while Wales will feel obliged to take more risks, meaning we either get blown away or else we score some tries from turnover ball. I don't think we'll get blown away.
4. Gavin Henson - A nice technical rugby player, but his awareness in defense is lacking and I think D'Arcy will catch him off guard.
5. I think we'll win the battle of the back rows because of Powell's penchant for playing as an auxiliary full back, as well as his general useless in and around the tight situations.
6. The Welsh team play a very in your face brand of rugby at the moment, it's success is anchored in their ability to win the collisions. I think we're a more physical side than them, so they'll be up against it.
EDIT: I forgot lucky number 7. I'm going to be there.