Need input on adding extra speakers

[themainman]

Well I'm getting a four channel soundstream amp that is 60watts x 4. As of right now I have four 6.5 Infinity 6002i. I would like to stick with infinity. My vehicle is a 2002 Dodge Durango. I know I should add some tweeters but is there anything else that should go?

Edit: teh amp is 40rms at 4ohm and 60rms at 2ohm

[squeak9798]

Why do you think you need to add tweeters?? The fewer the amount of speakers, the better.