As a long time NS user ( over 15 yrs) I might be biased toward NS, though over the years I worked on multiple other ERP platforms like MS Dynamics GP, Sage X3, S4 Hana, Oracle fusion etc. As tier one ERP Oracle Fusion would be a good choice, Cloud based and complete package, next contender would be MS Dynamics 365 the new one (GP sucks). For manufacturing Sage X3 is a good choice for mid market. Infor is pretty good for contract related businesses, they have good manufacturing support too. S4 Hana is powerful but need an army to run it, bloated process, user unfriendly and incomplete archaic structure. SAP will nickel and time you, also not Cloud ready yet, need a client to setup configurations. Open source Odoo is an excellent choice robust and modular will meet every need, that's why Toyota is using it. My two cents worth