If you use Simcoe as you only hop it will be real bitter after two weeks in the bottle. After four weeks it will be awesome. After five weeks it will be gone. Go with a bigger than usuall boil for maximum hops utilization. Like you said, 1oz. for 60, and split the second ounce with 25, 15 & 5 minutes left. Third ounce for dry hop in primary.
I am making an IPA tonight but using Simcoe, Cascade, Cascade. I try something new every week.