Is it worth upgrading my front door speakers for an extra 25 watts rms?

My 4 channel pioneer amp is putting out 60 watts to each channel. not realizing that at the time, bought 4 new pioneer 6x8s, but only 40 watts rms. In order to improve sound quality, I am thinking about purchasing a new set of 6x8's for the front with 60 watts rms. Is it worth it? will i notice any difference in loudness and sound quality? I know somebody who hooks me up with Pioneer stuff, so please don't recommend me purchasing anything else. I have a 2005 ford Escape with a full system (pioneer double din head unit, pioneer 4 channel amp, pioneer mono amp, and 12" pioneer sub) if that makes any difference.