I have a Raleigh Misceo 4.0 that is a belt drive and I LOVE this bike. Retail pricing is a bit above the ~$1,000 that you are looking to spend (honestly, all belt drives are going to be above that price point new).
Unfortunately, Raleigh no longer makes the version that I have (11 speed Alfine hub), but the 2015 version has an i8. It looks like the retail pricing on it is ~$1300, which is about $300 cheaper than the 11 speed retail pricing last year.
Raleigh also updated their Cadent to have a belt drive with the 8 speed hub. It looks like it retails at the same price as the Misceo i8, but is about 4 pounds lighter.
You can also check out the Spot Brand bikes, but they are a lot more expensive ($1600+). Marin also makes a nice belt drive commuter, but I am not sure about the costs on that one.
Joe Bike has a lot of good information on belt drive commuter bikes. I would highly suggest reading through some of their website:
http://www.joe-bike.com/bikes/commuter-bikes/
If you wanted to check out my Raleigh, let me know.