I don't see a benefit right now to upgrading from the original wooden bed. I have no issues with sagging or warping and my glass platform insures a perfectly flat build platform. Other than my desire to have the newest, best and brightest of everything, I can't find a needs for this... yet.
I would like mounting hole pattern on the top though to make sure I have a slop nut to fit it in case I do switch.
SD3 w/ mods:
Glass bed with QU-BD heat pad upgrade, threadless ballscrew w/ 8mm smooth rod, spectra line belt replacement, lawsy MK5 extruder, Lawsy replacement carriage, E3D hotend, Ramps 1.4 w/ reprap discount controller, DRV8825 drivers, 12v 30A PS, Acrylic case, Overkill Y-idlers, Filament alarm, Extruder fan + more.