The Lian Li XB-01 isn't ugly.
But I can tell you from experience it isn't an easy going watercooling the xbox. I tried doing mine this past summer. You will either have to run a 2nd power supply or solder on to the xbox board in order to grab power for the pump. I gave up at this point. You are going to need a very small pump in order to get it to fit and bleeding is going to not entirely pleasant I may add.