Fair enough. In that case, my advice is to make sure that you're clear about exactly how much data transfer your host allows and to consider using a content delivery network (perhaps just for the newest/most popular files) once you start getting close to the limits.
For example, Amazon S3 will give you 15 GB/month of data transfer, for free for one year. After that, 15 GB/month will cost $2.10/month. MaxCDN will give you 1TB to use within 12 months for $40. If you're just serving a few large static files, these services are very easy to use and because they can be switched on and off, less troublesome than migrating between hosts when forced by account suspension or poor performance.