What do you intend to make on the table?
Having built one out of channel with 1" slots that allow clamping anywhere on the surface with regular c-clamps; I don't think I'd consider a plate table larger than 2' ever again (some things still lend themselves to a smooth uninterrupted surface).

The wheels were temporary, as I used the 1200# table as a mobile base for a crane to erect my bridge crane runway beams.
It's also arguably flatter than a plate table would be:
Building railings is a breeze on this thing. Just lay the parts down and clamp them where they need to be. No grinding, no tacks, no problem making changes. Plus I can make fixtures that clamp to the table and then remove them when not needed (for repeating jobs). It eliminates needing a rigid frame within jigs as the table frame fills that need.