Now right off the bat, the covers are ALL adorable. We had a sexy Santa and Catherine Dair's wonderful illustration and all of Karan's efforts which would be absolutely perfect for any cozy mystery holiday entry. Probably my personal favorite was Dovie's cover -- love, love, love that photo and the red border!
But here is where I turn into the Grinch at the party because I actually think the cover that most fulfilled my criteria -- the challenge of matching an already existing five-book series while making it look festive and Christmassy was #4 by Johanna Ollila. She even used the cover model we've used throughout the series (yes, I know we're all sick of him, but still!). :-D It's got CHRISTMAS LIGHTS ON THE BORDER!!!
The reader choice here was Karan K. with #2 -- and it is such a cute cover and it does basically everything I asked -- but but but...I'm going with my gut instinct and (as warned ahead of time) overruling the electoral college and choosing #4.