My son turned two in June and I am expecting our second boy in November. I decided that we would transfer him to his "big boy" bed at 25 months. He, like your daughter, has always been a very good sleeper and never tried to climb out of his crib.
When we first made the switch, he was unsure because we had switched rooms on him as well so that the new baby could have the nursery (we have really small rooms). But we tried to make it really special with a new bedspread that he got to pick out (Thomas the Train) and we made it a huge party.
Regardless of all those plans, Daddy still had to sleep next to his bed for a few nights until he knew there was nothing to be afraid of (different shadows on the wall, the closet door, etc). Now, he's adjusted.. it has been about a month... and he's doing just fine.
I've always felt that we could have moved him sooner, but there really wasn't a reason to until we needed to have the crib for someone else. I'd say your daughter is probably ready to move now, just be prepared for a little adjustment period.