I am currently using a 2010 15" MBP. Has served me well over the years, but I am looking to upgrade, mainly for the retina screen, and the slimmer profile. I was hoping for a nice boost in battery time with the Haswell processors, but an hour is negligible. I mainly use my mbp for coding when traveling: xcode, etc...I do all my testing on my 2012 iMac. I also use it for the normal stuff, and not for gaming. Given the battery time is not significantly improved (1hr), I am wondering if I should just go with the last generation rMBP and potentially save some $$. I would look at doing 16gb RAM, i7...if I went with an older version. Are there any significant changes that will affect a user like myself with the newest rMBP? I see a lot of negativity towards it in the forum-and people disappointed with the integrated video. How are the benchmarks new vs. last gen? Significant increase? Thank you!