I'm in the process of finalizing new updates to the Service Provider CCIE racks and publishing the new hardware specification. I'm going to be using the new hardware specification for my London SPv3 Bootcamp in two weeks before releasing it to the public. I've already replaced the two CE 2600XMs with four 1841's running IOS 15.1T for the CEs. This allows for additional IPv6 VRF support along with many other newer features on the CE devices. Also having 2 extra CE devices is nice.