Imo, the main benefit of plug and play is that it saves a ton of time. And you'll get full support for it. The downside is you are locked into their system, and the cost.
My choice would be Leadshine EM806 drives, Antek 60V power supply, and either the AVID Nema 34's, or something similar, 650-960 oz, rated at least 6 amps.
My preference is UCCNC.
I recently heard that the Masso is now much better, but for the first few years is was available, it was just not quite "ready".
My Huanyang VFD has been fine, but many like the Hitachi if you want a better quality VFD.
I have two cheap round air cooled spindles, but if they die, I'll try one of these.
https://www.ebay.com/itm/2-2KW-ER25-...IAAOSw7e9dXQpt