Move Sage 50 company data to the cloud

Hi,

We're a small tax team with 2 users providing payroll tax etc. services to about 10 clients. We've been running Sage 50C on server/workstation environment forever but it's no longer making sense financially to maintain a server and Sage software of 3 users for such a small team and the hassle of remote access. We plan to move to the Sage cloud and need some advice on the migration path and if we should look into 'Sage 100' or 'Sage Business cloud accounting'?

Thanks

Calvin