I agree with Lienmarine, that 10 wouldn't be OUT of the question, but more likely, I'd guess 6 on the lower end to 8 on the higher end. But then again, these are all just guesses and as we all know, 2 bikes that are the same year, same model, the same exact mods can put up different numbers on the dyno and ****, one can even last miles longer than the other for any number of reasons.
But one thing I do want to put out there is Unrest you definitely hit it right on the nose for best mods. I think Full 2 bros exhaust, Power Commander, and K&N filter/Pod Filter are the three best main mods for increasing HP and rideability. I would call them the "Perfect Trio" haha. you can do it all for under $1000 if you shop around for deals and install yourself and none of them are too crazy or compromise longevity. I personally will do these three right after I get my bike and finish the break-in. Be sure to let us know what kind of increases you get once you got it all set up bro! Good topic too, Unrest!