WOW!!! I bought the exact same 3.5" speakers that you did and I wasn't at all impressed with the sound. I listen to rock though so maybe that was the difference.
I was so fed up with the Bose system that I finally changed the whole system out. I still used all Infinity except for the sub. JL AUDIO for that.
They sound great to me. It actually has highs now. I also listen to rock.
My 04 is going to be treated to a set of Hertz components and probably an IM sub all hooked into Zed amps. I'm not sure about the HU yet.