Just Colorado for state reporting? Anything out of ordinary like certified PR's, unions, tip reporting? I assume mostly direct deposit. Do you have any other clients running v2018 PR? You could try asking Linda Cade to see if they have any live installs with the number of employees you are looking at. Since you aren't live in v2017, spin up a test install of v2018 and migrate the data. Then run a side by side test using both versions. If you get similar results and the cloud tax calc speed is acceptable, then it may be worth a shot. Also, get Linda Cade to give you some support guarantees so you aren't caught in white water rapids without your paddle and helmet.