How does one determine if the processor is Penryn on a MBP? I'm specifically wondering if every 2.6 GHz early 08 MBP is going to be a Penryn processor - Apple doesn't seem to clearly denote this on their clearance or refurb sale pages? What about the 2.5 GHz models? Also - is Penryn definitely the best option available for these MBPs? Are the current unibody MBPs using Penryn? Thanks!