I have 3 compressed cervical vertebrae and carpal tunnel in both wrists and ergonomics is my friend. I use Ergo GP2 grips. The bar ends are small and allow for a change in hand position, which helps. I also cut the width of my bars down so that my arms are parallel to each other when I ride and not turned outward away from each other.
My complete bar setup is:
Spank Spike Race 50mm riser bars
Bontrager Elite Blendr 90mm 25 degree stem
Ergon GP2 grips/bar ends
Here are a couple of photos:
