What about using your Jamis road bike with a Topeak beam rack and trunk bag
http://www.topeak.com/products/Racks/MTXBeamRackE-Type? That will get the weight off your back. For fenders, you can get speed fenders (
http://www.rei.com/product/723111) which don't need eyelets. So, for about $200, you could turn your current bike into a light, fast commuter.
If you still want a new bike, though, I'd recommend the Trek Portland which has the braze ons you want, drop bars, disk brakes, under $2k, and is pretty light at 22-23 lbs.