Don't forget about sforzando. It also comes with BiaB/RT and it is a step above soundfonts, but it is not GM so you have to assign each track to a SFZ, a sforzando instrument.

The rule of thumb when it comes to MIDI is the better the sounds the more it is going to cost.

I work almost exclusively with MIDI so if you need help feel free to ask.

Good luck.

Whenever I get something stuck in the back of my throat, I dislodge it by drinking a beer.
It's called the Heineken Maneuver.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware