Best domain for long term use and SEO

I've got two domains:
factsfun.com
funfacts.biz
I'd like to rank for the keyword "fun facts" – but I'm just wondering which domain would be best to use in the long run? FunFacts.biz flows better, but obviously it's .biz, factsfun.com is a reversal of the words, but .com. Any advice?

See original post by Galaxian