I too had a trip planned a couple weeks after I got my car so I did a lot of driving around after work to put a dent in the break in miles. I got to around 900 miles before I hit the highways to Cincinnati. I'm over 14k now and all is well. I'd say the 1000 miles is thing is a general suggestion. It can be a little give or take.
I'm pretty torn about my headlights too. I can't decide whether I want to paint them black or just keep the chrome. I think they both look good.