Treated myself to a 4ft by 4ft battle mat off Amazon. It is very nicely detailed and really does look good from a distance. My only niggle is that PVC has a slight sheen to it and does reflect harsh light. Still at £40 I still think it was a good buy. At this price you could collect a small collection for different battles. A snow one would be nice. Might need to do some more research...maybe a cloth mat that could be rolled up would be better.
The pattern is heath land I think, I thought it works on a number of eras and scales from sci-fi to ECW.