Did I screw up Edy's>R/T's

I'm at a cross roads at the moment, I know your supposed to make a plan and stick to it but having second thoughts now.
Was planning on using the Edy magnums(58 cc chamber) so purchased -20 dish diamonds = 10.6:1
After some more research I feel the R/T head would be more bang for the buck, performance wise and in the wallet.
With the pistons already bought and installed in block, my concern is the CR being to high 10.2:1 +/- for a steel head.
Plan on burning premium and some oct booster, is this do able for a street motor or am I just trying to fool myself ??
My #'s may be off a little but close
Any and all input would be appreciated