I bought a 15" 2.8GHz mbp just a couple of weeks ago and did the 1.7 firmware upgrade (didnt know at the time that it could render your mb/mbp useless with 3rd party sata-II hdds). Anyway I tried installing a few 3rd party SATA-II hdds and they all didnt work. Well they did work except that I get a freeze under OSX every minute or two with the color wheel popping out rendering the mbp useless. So I came to my own conclusion that the 15" and 13" mbps all have a SATA-I controller and does not accept SATA-II hdds. Now I'm starting to look at the 17" mbp as this issue does not affect the 17". So what do you guys think? I know there were some 13" and 15" users of the new unibody mbp that applied the 1.7 firmware that can upgrade to an SSD or any other SATA-II hdd and worked fine.