I know the topic of prev. gen vs unibody has been discussed a lot. But If you had the choice between a refurbished (both are refurb) 17" Anti-glare Unibody with 2.6ghz, 4gb ram, 320gb HD or PREV GEN 17" Matte LED(high res), 2.5ghz, 4gb ram, 320gb HD, 512mb 8600gt Both are exactly the same price of $1999, that's why I'm not sure which one I don't care about built in battery vs the old style or small differences in front side bus and ddr2 vs ddr3 memory. I am looking more at the changes in the case, battery life and display. So, for the people who upgraded from a previous gen to unibody.. are you happier with the new one? Does the case, battery, and display in the unibody make it that much better vs the older model?