opinions on tohatsu, hp needed

i wonder if anyone has opinions on tohatsu 4 strokes? i understand that they are making the mercury and nissan brands now. i am looking at a 9.8 or a15 hp to push my 1444 g3. i relize the 15 would be a better engine, how much better?how hard is it to find 9.8 decals to overcome the 9.8 restrictions?does anyone know of the best prices out there?i have been gone from the forum for a while and it is fun to be back. thanh u ahead of time