Hey, I'm new here and haven't become very knowledgeable with the site yet, so forgive me if I've posted this in the incorrect place.

I've been wanting to get a new bike for months and really want to break into the world of fixed gear. I've been checking on my local craigslist constantly, but haven't found anything (I'm 5'2" with a 30" inseam). I've found the infamous bikesdirect.com and am between the Windsor Clockwork, Mercier Kilo TT, and just started looking at the Motobecane Messenger.
Could anyone give me some pros/cons of each, or just tell me which they prefer and why? I don't want to drop that amount of money without getting some advice.