If I were buying one, I'd go for a chest of drawers with a change mat on top (I assume you mean the shaped foam mats) and I'd add on a raised lip (beading) around the top of the chest to stop things sliding off it when the baby wriggles!
If you are handy, it might be worth adding a raised edge of a few inches to encourage the baby to stay on top of the chest once he/she starts moving.

I was given a change table (MIL's old one) and it was handy being able to wheel it around from room to room, but I would have had more storage space with a chest of drawers.

Kerrie