I always ask my target audience to spell names to me, and as Systreg will attest joe public is pretty damned stupid without google autocorrect/suggest.
I don't think many would spell it right, which means it fails the radio test, I don't think I've ever heard anyone in the UK say rapturous, a few kinda wished the nominet board was raptured, but think it would work better on a global thing.
That said if you plan to brand it yourself, create an identity to go with it i.e. logo, letter head, slogan etc, you maybe in a better position to sell the idea. I've moved a few domains this way which alone are weak but when combined with an idea and artwork to support has been enough to encourage someone to take it.