Hmmmm... Primare I30 will be very nice with the 803D at moderate to low listening levels for Jazz, chamber music and vocals, and will suffice for louder listening if not completely capable of convincing recreation of a full orchestra or the Who live.
For what it is worth, I think Dyn's are hungrier than B&W's. THat said, even though Classe electronics are distributed and often demo'd with B&W and the combination produces a very nice midrange, Classe's separates are really better suited for smaller scale music with the big B's, lacking some bass umph. I have not heard the 803D's with any Macintosh gear, but think that unless you want to go to some beastly integrateds like the Krell FBI, Plinius Hiato or a used Musical Fidelity KW, you are only going to get marginal improvements over the I30 with other 100 to 200 W Integratged solutions. The I30 is a really beefy little amp.