If you are willing to spend the cash go for it.
Best buy one of the larger ones that cover an entire table too.
Be sure to use non-permanent markers, though.
If you are going to use a map you may want to start with a dungeon.
They are easy to lay out and makes PC and NPC actions more foreseeable.
Also; only draw the map on the dungeon as they are exploring it. Seeing
the entire dungeon before entering it can be a major spoiler.
What about this ?