A friend of mine has a mostly-stock T1, and it's a damn light bike. OP, I'm sure if you test rode one of those, you'd find it to be "light enough". Of course, if you would prefer to build it yourself, maybe a Bare Knuckle or Rush would be in your price range.

about pedals: recently it was said that 'clipless will be lighter than track pedals...' or something. It's always going to be a specific comparison; low-end SPD stuff is often really heavy— for example, both of my MKS sylvan lites with alloy clips are about the weight of one shimano SPD pedal that I had in the house.