that $400 dollars is not that elastic. I have $600 left in my bank account after working this summer. If I take out 400, i'll still have $200 so my account will say open. That is why I have a $400 limit, that isn't just a nominal number. I find that if I buy a $400 dollar bike, I'll just get another steel framed bike, with so-so components, and I'll be back where I started-having to work so the bank doesn't close my account.
That is unless, you know of any bikes less than $400 that are light with nice components.
Also, I suppose I will use this bike for general touring/cross training from running. My coach suggested cross-training either swimming or biking, but i hate swimming and I like going fast, so i chose biking