What speakers should I get to put in my dads car. He got XM for x-mas and usually listens to the talk radio/sports broadcasts. He really likes the type-Rs in my moms car, which I may get some to put in his. He just wants it really clear. Probably wont put an amp to them, and its the stock head unit. He wants to stay around 250-400 for the speakers. Should I get the Type-Rs or something else.