Bike looks good - should be a blast.

+1 on the Ultegra pedals from probikekit.com - but the 105's will be pretty good too, and a little cheaper.

http://www.probikekit.com/display.php?code=M8000

Now you have to get shoes as well. I would recommend trying those on somewhere before you buy. Then shorts, shirts, socks (unless you are a crazy yank - then use tube socks), helmet, chamois cream, shades, water bottles - oh, the list goes on and on - may have to ditch the wife.