Nick, I have 3- workbenches made of framing lumber - mostly 2x8's and all 3- are "decked" with 3/4" plywood and held-down with frequently spaced SQUARE DRIVE Flat Head Screws. My workbenches get used by several people every day. Yeah, they get banged-up; but to me that seems to be the purpose of these workbenches. When they get too worn, it is a very simple matter to unbolt vises, back-out the screws and replace them and then their vises. DON'T USE GLUE, the often-spaced screws will be all you need. My workbenches have a few holes in them under things like miter saw and benchtop drill press - this makes clean-up much easier. I've used benches such as this for well over 20 years. If you utilize 1x lumber, you will most likely spend more money and be disappointed with the performance. My Dad acquired numerous GluLam beams and used pieces from 4 to 14 feet long to deck his benches - he wanted that "extra weight". His "decks" were about 5" thick.
Good luck, Otis Guillebeau from Auburn, Georgia
OPG3 Tweak everything!