New mud slinger from MO

I have a 2012 680 Rincon which I am completely in love with! Awesome machine! Big Red is completely stock with a couple exterior mods being the only exception. I would like to add some performance parts to pep things up but have no idea where to start. Suggestions please? Also want to add wheels and some serious mud slingers. Do I stay with stock size or go bigger? Really like this forum! Thanks in advance!