Rate Limiting and Bit Counting

I'm looking to evaluate some solutions for Rate limiting and bit counting / metering. I am not really interested in Filtering packets by application or protocol, just delivering bandwidth at a defined service level based on endpoint IP. I would also like to have the option to track how much data is transferred per endpoint for potential metering. I already use a smaller sandvine at another location and we are satisfied with it but this would be a bigger project so I am looking for alternatives. Does anyone have any experience with hardware like this they could recommend? Thanks, :Luke