Hi all! I know how these kind of questions become obsolete before even asking them, anyway... I have the first MBP 15'' ever released, and since three years it gives me so much satisfaction and still works very well. I want to replace it with a UMBP 17'' (matte). Do you think it is an appropriate time to make the step (considering I plan to keep it at least 3 years as well) or do you think it's worth to wait some months for the new revision of the line? Thanks to whom is willing to give me an opinion.