of the 6.5's?Polk 6.5's or 3X9's

Would it be better to run the Polk 6 X 9's inside the boat if room allows for the installation instead of the Polk DB651 6.5's?

If I am not planning on running a Sub would there be better base output with the 6 X 9's?

Any info is much appreciated...

One more thing, would this be a good choice to power the four speakers?

http://www.crutchfield.com/App/Product/Item/Main.aspx?g=218950&i=020APX480M&search=Clarion+VEN DORID020&searchdisplay=Clarion&tp=714

I found a place where I can buy the Clarion AMP for about $200 shipped.

Thanks again.


Weskel