Last spring I picked up an OEM 19mm RSB and used the RaliTek endlinks, if you can find a used bar in the forums, then go for it as it will save you $40 or so. At the time I was looking, nothing was available so I purchased new. For the front I went with the RaliTek FSB & their end links. Hands down much better than what came with the car.
I recently installed the GTWorx Bilstein Cup Kit with the Black springs. When I was done with the install I took it out for a quick spin. To make a long story short... I had a huge smile on my face when I returned home. It's a nice drop, not bone shattering firm, but a firm ride none-the-less and it handles great. I'm extremely happy with the GTWorx kit thus far and I'm glad I finally pulled the trigger on them... no regrets at all.