This riff is a keeper
I think the way you played out those chords sounded pretty badass. A nifty little arpeggio. This doesn't sound like a real 'loop', though since it ends pretty abruptly. Definitely save this riff for a badass chorus in a song and just come up with a verse and a bridge.
Other than that, I'm definitely envying your soundfonts, or w/e it is you're using for guitar and drums....