I suggest slapping on a decent set of aerobars. Not a bad investment to drop $100 on them since you can take them with you when you upgrade the bike later. I say this because I went cheap on the first bike I had (a $450 cyclocross bike turned roadie) and although I didn't have to buy new bars for the new sweet ride, I am much happier with the Syntace C2 that I run now over the cheapies that I used to run.
You will need to move your seat forward to get in a good aero position without making yourself sterile, so look and see what you can do without buying a new post. If you do decide on a new post, Profile makes a set-forward post and Thomson has a setback post that can be reversed and will work both ways. My bike came with the Thomson and it was easy to turn it around and get everything to work.