RC1 is just a stake in the ground saying, "This is where we are. We think it's pretty good and now we're moving forward." Nightly improvements are still being made. It's not a function of stability as much as it is a declaration of "We are at this point." There are bugs in RC 1 that are fixed in build #1 (Rotary Lock Screen image ghost is an example) and there have been camera improvements since RC1. I would keep your options open. Keep an eye on this thread and when the features become good enough to re-flash, then go for it.
EDIT: OK wow I'm late - this is in response to the RC1 question about 6 posts back. That's what I get for watching a movie and not refreshing!