Which Mac book pro?

[CandyApple]

I am going to buy a mbox 2 Pro. I am a solo musician and typical projects will be 16 tracks or less with generous use of plugins at 96kz.

The 17" MacBookPro has TWO firewire ports (FW400, FW800), whereas the 15" MBP has ONE firewire 800 port.

The 17" MBP has a 2.6Ghx CPU, the 15" MBP has a 2.8Ghz CPU.

The 17" MBP has 4gig of 667Mhz DDR2 memory, the 15" MBP has 4gig of 1066Mhz DDR3 SDRAM.

The 17" MBP has 800Mhz frontside bus, the 15" MBP has 1066Mhz frontside bus.

The 17" MBP has NVIDIA GeForce 8600M GT graphics processor, the 15" MBP has a 9600M GT processor.

So, the 17" has wider screen and two FW ports, but the 15" seems a bit faster.

Does the better 15" MBP speed specs amount to a noticeable advantage in terms of supportable PT tracks/etc or overall PT performance?

Will either MBP support my more modest needs (< 16 tracks at 96kz)?

Are both off-the-shelf MBP's typically compatible with PT?

Which MBP would you choose and why?

Thanks so much in advance