What kind of bathroom vanity top material can be easily cut?

[OnionPatch]

We're remodeling our bathroom and need to replace the vanity. The closest standard width I can find for a pre-cut bathroom vanity top is 49". The opening in our bathroom for the vanity is 47.75 inches.

I've never remodeled a bathroom before and could use some advice. Would it be cheaper to buy a 49" pre-cut top (which usually includes the sink) and cut some off the sides or would it be better to just buy a custom sized vanity top? It looks like the former owner cut a standard 49" to size, so it must be possible.

If cutting one to size is the cheaper/faster option, what materials are easier to cut and what kind of saws are required?

I actually tried to ask these questions at the local home improvement store but got only a confused and harried response. I'd like to go back with a better idea of what I'm looking for. Thanks for any advice you can offer.