I've run both, the grip of the q3 is hard to beat for the price, however if you commute with the bike, then I'd suggest the power 3, I put a lot of miles on it, and did a track day with no issues
How do you plan on riding?
Ride in the rain?
How many miles/year?
Track Days?
PP3
Longer lasting generally
Better in the wet
Very good on the street, with an occasional trackday
Q3
Very sticky for a street tire
Excellent for trackdays,
generally wears faster
I have PP3s on my SV650
I have Q3s on my ZX6R