Deciding on when to pull the trigger on a MBP is more difficult then............
If you were thinking 15 or 17, I would say dive in head first...
From an economical standpoint, since the 13 inch MBP had the least amount of changes in its last revision, it will get the most amount of of revisions in this current change.
From a buyer's standpoint, you may not like these changes as much as the current design.
From a probability standpoint, Apple likes to differentiate the 15/17 as the 'pro' line of the MacBook Pro, and so I would not expect to see an i7 in a 13 anytime soon
From my standpoint, the current 13 inch MBP is fast, especially with a SSD. For most users, including myself, you are going to be delighted with it and may not even utilize a more powerful system. For some users however, you are going to get your money's worth if you go for a MBP with more capability (and hence higher pricing). If the 13 inch comes out with a i3 processor, then I will take the Core 2 Duo (all other things alike).
Probably the bottom line though is that no one knows what the heck is going to happen and so I would hold off on a 13 to at least see what is coming; then you can always buy the current but you won't look back and think 'crap, I wish I waited 11 days...'
If you were thinking 15 or 17, I would say dive in head first...
From an economical standpoint, since the 13 inch MBP had the least amount of changes in its last revision, it will get the most amount of of revisions in this current change.
From a buyer's standpoint, you may not like these changes as much as the current design.
From a probability standpoint, Apple likes to differentiate the 15/17 as the 'pro' line of the MacBook Pro, and so I would not expect to see an i7 in a 13 anytime soon
From my standpoint, the current 13 inch MBP is fast, especially with a SSD. For most users, including myself, you are going to be delighted with it and may not even utilize a more powerful system. For some users however, you are going to get your money's worth if you go for a MBP with more capability (and hence higher pricing). If the 13 inch comes out with a i3 processor, then I will take the Core 2 Duo (all other things alike).
Probably the bottom line though is that no one knows what the heck is going to happen and so I would hold off on a 13 to at least see what is coming; then you can always buy the current but you won't look back and think 'crap, I wish I waited 11 days...'