The design of this one is also very strong and it will accomodate acoustic guitars. The front two casters have locks on them to keep it in place on hardwood floors.
I'm assuming you don't have to worry about the dreaded "bleed" onto the finish from the stand's contact points? As you can probably tell, it's been years since I've bought any, but I recall one of my first stands had that yellowish rubber stuff - luckily I didn't use it all that much, and it's long gone.
They're injection molded plastic it says on the site. I was just checking these out on Sunday. They look pretty good. They also make a revolving display stand, for those of you with larger collections, though they only show acoustics on the rack. Don't know the weight restrictions, if any.
They do look sturdy, & they fold up for transport!