That looks good to me! I'm a big fan of Chinook all around, both bittering and flavor additions. I just read a recent article about "Hop Bursting", so the 3 oz of Centennial at flameout looks rather appealing to me. That and I love Centennial.
The only thing you might think about is adding a little, say .5# of some time of crystal malt. Just to give it a little character. 3 oz Columbus is also pretty aggressive for a 6.5% beer, maybe try 2 oz for five days, taste it and see what you think. Just my $.02 though! Enjoy all grain, it tastes so much better IMO!