Robert_Charlton - 7:58 pm on Jan 23, 2011 (gmt 0)

niceday.net

I was about to post the same suggestion... of those you posted, niceday.net is by far the best.

But quality and uniqueness of content and inbound link quality are going to count for a lot more than the domain name. I see many exact match domains way down in the serps because they've ignored these other factors.