1. Getzlaf - With the situation you presented, it makes more sense to keep Getzlaf. He will be the best player available if you let him go. If you let Rask go, you say the first 4 owners in line are likely to not pick goalies, giving you the chance to draft Rask back to your squad or draft Price.
2. I don't think Rask is much of a question mark, it's his time in Boston, and I very much doubt anything gets in his way this time around. He should be one of the best keeper goalies for years to come.
3. I don't think it's foolish to think he could drop back to you at 5th overall. You say there are 4 guys ahead of you who kept goalies and are likely to want to add elsewhere, on top of that there is another great goalie option out there in Price, I like your chances at landing one of them; then I do getting Getzlaf back if he were to be your drop.
4. The better result is keeping Getzlaf, in my opinion. With the scnario you presented it doesn't seem like there will be as good of forwards available, as there will be goalies. I still think very highly of Getzlaf even after last years big disappointment. With the 5 pick you have a good shot at getting Rask back, or getting Price who is every bit as good if not better, and failing to get them Fleury is a possible option, and if that to fails, Kipper makes for an excellent one year stop gap.