Tenniswarehouse lists the power level of the 5.3 oversized as medium and that of the BLX Pro Limited as high. However, the weight, balance, length and headsize are extremely close but the 5.3 is much stiffer and slightly thicker so it seems that it should be more powerful than the BLX Pro Limited. Ah I just read the specs of the Dunlop Bio..500 Plus and it's stiffer and thicker than the other two models but it's listed as medium to high in power! Now, how in the world could that be less powerful than the blx pro limited? Any tenniswarehouse employees care to comment, in addition to other people?