repowering my 21 foor stamas walkaround from a 200hp merc to a 175 or a 225, The 225 is more money, but i'm in a jam right now and can only afford the 175hp vro, should i just get the 175 now which i can afford or hold out a little longer for the 225hp motor.<br />both motors are 1990's <br /><br />anyone with ideas on performance diff from a 225 to a 175 ?