I just picked up a used (I'm saying used because the guy that brought it in on consignment said new but I'm doubtful) 24-70 2.8L MKI. This will tide me over until the MKII comes out. I was also debating on whether to get the 16-35 II, but went the other route because I might get a UW prime once the 24-70II is in. I have 7 days to return it, so I have to make sure it's ok. Glass is pristine and body looks almost new. Tried the focusing and it was fast and snappy. Zoom seemed ok too. Anything else you guys would suggest other than taking a bunch of shots and checking them over?