blocking bass

The Infinity is definitely a better speaker but you might want to listen to both of them to decide what you like. just in case. Your head-units internal amp will rarely output 25 to 30 watts much less 45 so power should not be a problem. Those Infinity speakers could handle a small amp easily. Try some 300 hz bass blockers. If you live in the US you can get a much better deal on the Infinity speakers you were looking at by ordering from crutchfield.com. They also give you free vehicle specific wiring harneses and instructions on how to install your new equipment in your car. Infinity 4002i

Sorry i wans't thinking right. The price on the website you listed is in Canadian dollars (its a reasonable price for those speakers).