Audio Composer looking for decent sounding instruments

I write to midi, and then import that midi to another program to replace each channel with a soundfont file. But even by doing that, the instruments still sound kinda...bad.

What's the easiest way to get a decent sound out of my .midi files?

 

Send your midi files to your Google drive and share them to men I have a software that can read midi and assign realistic instruments to them. We can work together. If you want.

 

Oh. Well that's generous.

It's more of a hobby than anything else, so I'm not sure if a collaboration will be worthwhile. But uh, here. This is a song I have in my game right now:

.midi:
http://www.mediafire.com/file/xe60272p9jn3x5j/Palace_on_the_Endless_Sea.mid

.wav:
http://www.mediafire.com/file/qh70y396h0tlh6p/Palace_on_the_Endless_Sea.wav