718 is better then GTO series, ...... that might be my personal taste, but i felt that, also JBL GTo isn't in gud shape then 718 .
if u can put some more then go for JBL power series as recommended by ahsan1702 before, they are gud, but again in this catagory poineer have some very gud speakers , dont rem the model but they worth abt 6000 in market, really kooL