We also use Maxmind and couldn't be happier with their service. Some sort of fraud protection is a must when doing business online.

Maxmind should be a must if you plan on reselling. They offer great ways to detect fraud.

We use Max Mind services and its great.

I have used maxmind for some time, have to be careful getting the settings right though too low and you are blocking good signups too high and its not doing its job.

John