First despite what you do with the gear is somewhat imaterial and the airplane will work well with either type and its usually done just for macho reasons.

But what is more important is the conversion to ailerons and depending on what you do can be a complete failure. You did not say if you are starting out with an already built airplane or just starting to build from a kit. This is a vital question be cause if the wing is already built to kit plans with plans diehdral then added airlerons either barn door or strips will not work properly and be very ineffective. If the airplane wing is already built with plans dihedral you must cut it appart and reduce the dihedral substancially. That figure is around half or less of the plans indication. Also maintaining some dieheral will make for a better flying airplane than one that has gonne totally flat.

John