Enterprise off site hosting versus Sell in the cloud

We our a small company with 8 team members currently using Enterprise V12, which is hosted off site for us by a Sugar Partner.  We are looking at the possibility of moving to Sell hosted by Sugar and I would be interested to hear other's opinion of the two versions and the benefits for and against being hosted by Sugar.  Our current partner is offering us a support package if we move to the cloud would this be necessary?

Thanks in advance for all your responses.

Joe