Supply duct velocity

Hi I am working on a small residential system and I have a question on supply trunk velocity. My main trunk will be sized to either 14” round at 740 ft/min or 12” round at 1000 ft/min for a short 25 ft run in unconditioned attic. I know Manual D recommends 700-900 ft/min so it looks like both sizes are borderline. My gut says go bigger duct for lower friction (not that 25 ft is long by any means) but I thought I’d check with the experts here. My branch ducts are all sized to about 400-500 ft/min so there will be no major noise in the branches. I just want to make sure that there is enough velocity in the main trunk.

source https://hvac-talk.com/vbb/showthread.php?2225836-Supply-duct-velocity&goto=newpost