Do not get Woodland Scenics unless you are glueing it down, otherwise the 'sand' finish tends to come off. It is like a rough sandpaper in texture and does not stick to the vinyl well. If you tend to knock your figures over when they are dead then I suspect it could also damage the paint job as it is so rough. Their green mats are excellent.
I had an old vinyl GW mat sitting doing nothing and just painted it 'desert', thus it does not crack and I can roll it up and put it away.