My big Rogers set has six double headed toms (12-13-14-15, 16FT 20FT) and two concert toms (8 & 10), and I wouldn't dream of installing reso heads on those concert toms. They add so much tonal variety and color to fills. There needn't be such debate about concert toms... they're just a different type of drum, just as are bongos or timbales. It shouldn't be a choice of one type of drum or the other. They all have their place.
Oh, I've been looking for the original concert tom trim material with no success. Please let us know what your solution is.
Mike C.