MC Symphony 6 on Macbook Pro 2.4 ghz

About to buy this from Avid along with new MBP. Problem is most of the 15" out there are only slightly faster than the 2.3 ghz avid requirement for mac laptops.

3 questions: is a new 2.4 MBP going to be quickly obsolete on the next version of MC in the next year or two? Theres not a lot of breathing room from 2.3 to 2.4.....

Also, with no pci port, is it ever going to be possible to trick this thing out with full Avid Hardware or is that only possible on a Mac Pro?

Lastly, even if I stay software only symphony, any performance issues I should expect/drive recommendations?

Thanks in advance for any and all advice.