I bought the H7527 set w/tailstock & indexing plates on sale for my X-3 last year http://www.grizzly.com/products/6-Ro...v-Plates/H7527 and it's the perfect size. Not too heavy to lift onto the table but big enough for reasonably serious work. One of the 1st things I made for it was an add-on aluminum 8" table with holes drilled & tapped all over it. Best of both worlds, 6" rotab weight with 8" dia. work surface.
I wouldn't pay what they're asking for it now though. The quality seems to be fair, not excellent. One of these days I'll take it apart and try to figure out how to reduce the backlash it has.