well for sure those are pretty calipers man!
And there is nothing wrong with using rear brake, dont get me wrong...it def helps settle the bike, if you use it a little bit before slamming the front coming to the end of straights! its also helpful as a very advanced tech of moving the rear end around into a corner..to turn faster and get on gas quicker!
IF i could use my rear, i would prolly practice it more (war injury)..but Ive gotten pretty fast and overcome that limitation.
Good luck, and if you do upgrade, i'm thinking your stopping power and bite back there will increase a lot....so dont go all HAM with that right foot straight outta the gate my man!
JAG