My Lorelies are in a carpeted basement room. To reduce the risk of potential water damage from a leaky water heater or an inoperable sump pump, I raised the speakers off of the floor by placing them on plinth-like platforms I assembled with parts purchased from Home Depot.
Each speaker sits on top of a 16" square piece of ceramic tile. (You might want to spring for granite.) Beneath each tile are four large furniture gliders like these:
http://tinyurl.com/mcyysp The tile squares are large enough to hide the gliders. The speakers slide on the carpeted floor as though they were on casters. If your speakers are in an uncarpeted room, you can buy the large gliders that come with woolie socks that would let you slide your speakers on hardwood floors or tile.
I should also mention that I placed a thin rubbery "gasket" between the tile and the speaker so that the speaker doesn't slide on the tile. The gasket is just a thin nonslip throw rug pad.
Don't know if this setup meets with Audiophile Approval or has an acceptable WAF, but it works for me.
If I had deeper pockets, I might go for outriggers or custom-made Sound Anchor stands.