Upgrading my 2011 MacBook and was in the market for a 2017 27" iMac. The most processor intensive thing it will be doing is HEVC video conversion. Occasionally it might be used for some gaming and some light app development (as a hobby), but 80% of the time it would be converting HEVC files in Handbrake. Would going for the top of the line 27" be overkill? I would either go for the base level 27" with an SSD upgrade, or the high end 27" with the Fusion drive. Space isn't too important to me since I'll be housing my iTunes on a NAS anyway. I know either option would probably be a major boost in performance compared to my current setup, but I'm also all for future proofing my devices. Would it be worth it to pony up the extra money now? Thanks!