For the Neo Soul genre I would recommend using live instruments when for things like saxophone or horns rather than the plugins. There are indeed many professional sounding plugins out there however they will never sound the same as the real thing, especially if you use quantization.
These type of plugins are generally best for electronic music or the main stream.
Check out the track I made below which uses a live saxophone recording. Imagine if I made this using a VST, it just Wouldn’t sound the same.