The problem with higher compression is octane requirements. If you want to run pump premium you'll need to keep the compression below 10:1. IMO, considering the crappy gas at the pumps I would keep it below 9.5:1 and that might be pushing it. You can take some timing out to make up for not enough octane (to a degree) but you lose more power by doing that than having a lower compression ratio to begin with.
