I've been riding my new fat bike 2-3 days per week since November. I'd rather ride than ski a WROD during the holidays. I'm very happy with my BikesDirect Night Train Bullet with Bluto fork. It was on sale for $1599 a couple of months ago but I think it's $1799 shipped now. You can get it without the Bluto for $1399. I got the Bluto because this will be my only mountain bike but if you will only be riding in snow I'd go without it. I've replaced the saddle, seat post and handlebars and converted to tubeless. It's still heavy at 33lbs.
Good discussion on the BikesDirect Night Train at MTBR.
You just missed the incredible Surly fat bike sale but Specialized is currently discounting their fat bikes. Altrec also has great prices on the Framed fat bikes link