Not a perfect match, but one of the cheaper options would be the Dimension Synergy
http://www.dynamicbicycles.com/synergy/road.php for US$800. Not clear what the clearances are so fenders may be an issue, but you can go with a crud catcher
http://www.biketiresdirect.com/search?kw2=crud and clip on rear
http://www.biketiresdirect.com/produ...ry-rear-fender . Also a chain not a belt, but if you are looking for a sub $1,000, this may be an alternative.
BTW - I'm thinking about getting the same type of bike you are looking for, but am undecided on the belt drive. Does anyone have an pinion on the pluses and minuses of the belt vs. chain? I like the reduced maintenance, but the cost and (at least to my untutored eye) increased complexity of the belt drive keeps me coming back to a chain.