An i3 or i5 for the 13" MBP would be more than enough, and let me tell you that the 15 and 17 inch models were kind of updated like 4 months ago. So there's really no need for SANDY bridge, not "sanday" , its not like they are being built every sunday.
You are right,
I have 6 month old i7 2.66mh, 4 GB Ram (wish i bought the 8GB)
SSD 128GB (wish i bought the SSD 256GB)
17"
Love it my 1st Apple
an IBM user,