Welcome to NICO.
It appears that the '09-'11 sedans have the same speaker configuration (at least for the Bose with nav package). It looks as though there is a woofer in the rear as well as woofers in the front two doors. The rear doors have a what looks to be a full-range speaker in them, though I can't tell the size. The front also has a mid-range driver in each door, as well as a tweeter near each pillar. There should also be a center speaker in the dash (mid-range).
Check the service manual (for the 2010 sedan you want to see page 355 of AV.pdf):
http://www.nicoclub.com/FSM/G37/Sedan/
One thing I should warn you about, upgrading the speakers on a Bose-equipped Nissan/Infiniti is a giant pain. The amp for the Bose speakers will be in the trunk, and will be tuned with the headunit to provide the best audio possible out of the stock Bose speakers (they have flaws, so the system is tuned to minimize the appearance of those flaws). Swapping just speakers likely wont improve the audio significantly. You would probably need to gut the whole system (head unit, amp and speakers) to achieve a noticeable improvement, in my opinion. That is precisely what I had to do with my car.
To be honest, it will be hard to figure out perfect compatibility without removing the stock speakers yourself and measuring size and impedance (using a multi-meter). Bose doesn't offer up much in terms of technical information on their gear. For most people, the best bet would be to get the base stereo and replace everything. Or just stick with the stock Bose system (unless you like spending oodles of cash).
