Out or curiosity, why do so many people say "take the plunge" when referring to buying a digital camera with a sensor that equals that of 35mm film? What do you say if you move on to medium format? "I just spent my kid's college fund!", or "I just sold the farm!"
My suggestion to the OP is why not buy a super sweet 5D mkII for 2K, and invest the rest of your budget in glass? I'd get the kit lens too, why not? You can always sell/ trade it for no loss. Or buy an EOS 1V monster for like 500 bucks and enjoy your EF lenses on a "full frame" gem that won't be outdated in a few years? Then use the rest of the money and take a vacation!