Sound Upgrade Choices...

[Hoyrodd24]

Hi I have a 05 RX330 I had the JVC kw nt30hd navigation head unit installed with the beat sonic amp integration. It sounds better. But now I bought two Polk audio DXI series 6.5 components as well as two 6/9s. And a Kicker 4channel amp.

We are going to let the head unit power the dash speakers and the other six(tweeters included) on amp. My question is has anyone upgraded all the factory speakers with an amp and if so was the sound better? And if so how much better would you say..? The factory speakers sound great currently with the new stereo so I was wondering what to expect. Thanks!