Short and to the point... I want a MBP but can't decide between the regular and retina. I want to hook it up to a 27" NON Apple monitor at 2560 x 1440. Granted there are dozens of rMBP threads and the Anandtech review about Safari in Lion vs ML. So if I missed this forgive me. How does the GPU in the two models handle an external monitor? Will the rMBP output 2560 x 1440 over the HDMI? Would thunderbolt work better for the display connection? Short of the SSD, is the high end 15" MBP more powerful than the high end rMBP? I try and keep a computer for ~3yrs before upgrading. I just want to make the best decision for the purchase. Thanks for the help. Edit: How does the battery hold up when plugged in all the time? And in case it matters, photography and video editing is what I really use the computer for.