10.7, Aperture

I have read many of the blogs on 10.7,Aperture, and printing with the Canon 9500 MarkII.

I downloaded the most recent drive that was suggested but still, my prints are so poor.

Is it a combination of 10.7 and Aperture? If I switch to LR will I have near perfect results?

I purchased a Monitor calibration system as well, have downloaded paper profiles, etc.

What's left? Any suggestions?

I bought this printer because I enjoy printing.

Very disappointed!