Err, I rather have fun with CS:GO and seems to have better registration then CS:S ever did.
I used this thread to set mine, and don't cap my max_fps.
I set cmdrate and update to 128 typically, on some of the custom maps we've played I've seen my frame rate drop below 128 so I set 64 for both. As from what I gathered CS:GO servers should run their tick rates either at 64 or 128, if the server has a lower tick rate then 128 it'll default your client to that. I leave rate at 80000 as from what I gathered that should be more than enough. I find experience much less of the CS:S getting shot *after* I've gone behind cover. I don't have much of a machine, just a Core i3-2100 and a 6850 1GB with stock clocks and 8G of DDR3. I run at 1080p with 4x/4x and setting maxed out and I typically average 160fps. Machine running Windows 7 x64 and boots to 34 running processes, no antivirus installed.
EDIT: I'm also on a typically very stable 50Mb Down/15Mb Up cable connection.