I voted for the Revolver due to your engine. That would be the 40 sized Revolver (59 inch). A .90 fourstroke usually replaces a .60 two stroke and most people are using 1.00-1.25 four strokes on those planes. Your .70 in a .60 size plane will be poorly powered. I haveflown the larger Revolver and it is a blast! Not a 3D plane but a great speedplane and very aerobatic. Just plane fun!