whats the best setup for a rush. hall 2 up? im clueless

Hall 2 up is fine. Keeps you away from the trees that stick up out there, and it gives you room from an enemy below you.

If you are going to completely wallin, most people stick the 2 farms across the top part of it, and 2 barracks right above that. I don't like that because you can't repair.

I suggest you build 1 rax in the opening spot, and wall the right side with a farm. Leave a spot for a 2 on 1 or 3 on 2 setup and build your 2nd barracks inside. This way if you are getting outrushed you can always put up a farm and start getting some defense WITHOUT losing any buildings.