I have the Ritchey WCS compact and it is great. I am using an Ultegra 6500 BB with it but the newer 5500 octalink 105 BB would be fine too. I am not sure I would even bother to upgrade the derailleurs unless you have money burning a hole in your pocket. Upgrading the shifters will be nore noticable (are they 105 or Ultegra?) so save up for that. Upgrading the FD is about the last thing I would do (yes I have an Ultegra FD but I got it with the build kit...105 would have been fine).
FWIW I got Performance to match the AEBike $125.99 price.