I'd be careful about switching so soon. I've done around 8-10 and I'm not sure I'm ready for them.
One of the instructors in St Louis said it very well. Driving on street tires on the track is a bit like walking across a ravine on a plank bridge (about 2 ft wide). Stepping up to Rs is a bit like walking across the ravine using a 2x8. Moving up to slicks is a bit like using a tight rope.
The street tires are more forgiving and you know when they are coming loose and can catch yourself. The Rs give are less forgiving, but you can still feel yourself losing control. By the time you lose it with the slicks, its too late.
If you are ready for bumping up to grippier tires, that is great. I'd just be careful. You also need to remember that making the tires stickier means you need a better suspension. Hit the limits on those and you'll need an oil separator. Its a slippery slope.