A valid point, but unless you need it right at this second, you can get a closeout MBP as soon as the new models surface in a week or two. I'm not sure what discounts are like in your area, but my university often discounts 30-40% on old model Macs.
I brought a new 13' MBP last week, I don't really buy computers according to when new ones are coming out. Plus I got a $300 education discount