We are looking for a PM software package or service that has most of the detail captured by Microsoft Project but incorporates the collaboration of Basecamp. Any thoughts or recommendations would be appreciated.
Project Managment Software to make Everyone happy?
There's several options out there but no real perfect option, unless you believe every vendor's advertisements! Here's a couple:
https://www.smartsheet.com (this is solution I came across by searching for basecamp alternatives).
There is also MS Project Server that can be integrated with Office 365 for anywhere availability. This one I'm a little more familiar with the product. https://products.office.com/en-us/project/enterprise-project-server
I cannot tell you that either is a cost effective solution but they will probably meet the majority of your needs when configured correctly.