Mine are due in next week. I went with the Altas, though I understand that there are consequences in doing so as they make the rear quite stiff and might be a bit on the noisy side. I'm doing all four.
The main reason for adding them is to re-camber the rear wheels due to lowering. The second reason that I am doing so is so I can fine tune my rear end and make it stiffer.
Should be on soon and I'll report back with photos.