Does anyone have consultant recommendations for assisting in upgrading Sage 500 ERP from 2013 7.5 to a more modern version?

Does anyone who has successfully updated Sage 500 ERP have any consultant or consulting company recommendations? 

We are currently on Sage 500 ERP 2013 7.50.30 and I have never upgraded the system. We have a reseller who we'll request a quote from, but since this is our first update/upgrade without the original team, I must get a few quotes from possible providers to get a better idea on the real costs. We are located in the north east.

If you have worked with anyone who did a good job with your upgrade then please pass on any recommendations.

Thank you very much!