Hey there, I was thinking about upgrading to the new MacBook Pro 15" with TouchBar from my good old Mid 2012 MBP and was thinking about those CPU specs. Is it really worth the price for the i7 2,7 or i7 2,9 GHz models? Is it just the clockrate or are there any other significant enhancements? Otherwise I'll get the 15" MBP w/ TB 2,6 GHz, 1 TB with Radeon Pro 460. Which hopefully will last for 4-5 years.