Everything kinda sounds really cloudy, and i have a hard time picking out what the drums are doing. Maybe a tighter sounding guitar tone that has more definition? Honestly i don't really care for the Pod HD 500. I've been using an X3 for a while and i prefer it, it seems to have a little more flexibility, IMO.
And for the drums, you should probably find some samples that can punch through a really heavy mix. I'm hardly an expert, so i don't know what samples are the best for that. But it's something to look out for.
I like it! The drums are a bit buried though. What did you use for the drum sound? The song is cool and the mix has an oldschool vibe to it that I like.