*everyone* has been helpful in all of your posts, including myself in a couple, which have pretty much been about the same thing... have you had a chance to read through some of those older posts?
The first one had a photographer discussing the results after he calibrated his new iMac i7 with a Spyder 3. He seemed happy? I have the Spyder 2 and have also had great results on my glossy 24" iMac.
I work with several photographers as well (which I think I mentioned before) and have seen their workflows. As an expample, I use these two depending on subject, time and budget:
http://www.gmpdigital.com/
http://www.danhoodphotography.com/enter
Where ever you have your prints done should be able to provide you with a screen profile for their printer... which would take tons of "guess work" out of the equation...
PS: nice photos.