would this sound good in my truck?

[RodgerH]

I have an extended cab truck with only 2 stock speakers in the doors. The are almost 20 years old. I was wandering if this would sound good.

Replacing the stock speakers with 2 of these http://www.bestbuy.com/site/olspage.jsp?skuId=8216254&type=product&id=11662361 06215

And adding 2 of these in boxes in the back http://www.bestbuy.com/site/olspage.jsp?skuId=8212784&type=product&id=11662361 05775

From reading about the it seems i'd be fine with no sub, but would i need some highs?

[leo]

yeah it would be fine. you wont need tweeters because they come with tweeters already. i have a system in my car and i never added tweeters because then it would be just so much highs with those 4 speakers in a truck you wil be just fine. if you get a some amp that would be even better and make those 4 speakers even louder and you wont need to add tweeters. alot of people add tweeter because they have no amp. once you get a amp it puts out alot more than your radio does. i say get a 4 channel 300watt amp. and you wil be happy