Crib w/changing table?

I was planning on getting a 7 in 1 convertible crib without a changing table attached, and using a dresser with changing area. But, my grandmother in law is now giving us a very tall new dresser, which will save us a lot of money, so we can't use that as a changing table anymore.
 My question is, is it worth all the extra $$$ for a convertible crib with changing table? Or could I just get by getting a changing pad and using it on the floor?