I have considered the Roadsmart option but I'm ascared. Gonna stick with the Q2 for now while I'm pushing the twisties hard and maybe try the RS at another later date.
No disrespect, but you still have chicken strips, and are still improving your skills(all of us are, no matter what level).
Q2's are your best bet as they are the stickiest; however, you aren't riding hard enough to outride a Roadsmart rear.
As long as the tire has time to get hot, and has proper psi, you won't have any grip issues street riding.
What you will have is a Roadsmart rear that will last as long as your Q2 front.
I've been through several sets with this combination. I won't run anything else on a Busa, B-King, or any big and heavy sportbike.
