Some of the earlier .60 sized pattern designs were pretty fast, look for planes that feature thin wings and overall streamlined appearance. There are also semi scale P-51s and Reno Racer... modified P-51s that are naturally fast if built light. The .60 size planes really benefit from having retracts, plus warbirds look just plain stupid blasting around with fixed gear hanging down.

If you really want to go fast, there are a couple of purpose built speed planes built in Europe that are available on a limited basis. Contact ILJ at the speed forum for more information.
Angelrcdesign also custom builds speed planes, he might have something just right for your Rossi.