If you have IKEA near you, get a TROFAST system. It's a really great table for
lego building. Just the right height, nice and sturdy, and you can put bins underneath for storage. We just bought two of these:
http://www.ikea.com/us/en/catalog/products/S49871290
put them back to back, and it's am AMAZING table for building legos, marble runs, domino rallys, etc.
You can simply glue the baseplates right on top, or not.