As you can see from the title, I am "downgrading" from a new Penryn MacBook to an older CoreDuo MacBook Pro, mainly for its graphics capability and the fact that I can make a bit of money out of the swap to help pay bills. What kind of performance decrease (if any) will I see in regards to boot time and general system performance? Also, any widespread issues with this particular model of MacBook Pro? The one I purchased still has 1 year of AppleCare left on it, just in case something happens. FYI: I generally use the MacBook in clamshell mode connected to a 22" LCD. System Info: 2.16 CoreDuo MacBook Pro 2gb System RAM 256mb VRAM 250gb HD 2.4GHz Core2Duo MacBook 4gb System RAM 250gb HD Thanks!