I'm looking for a device that will allow me to capture performace data on my truck before and after modifications. I'm especially interested in tracking horsepower, fuel economy, 0-60 times, etc. Most of the devices on the market are strictly designed to perform tuning functions - I haven't found many that simply record performance results. So far, I've come across the EFI Live Flash Scan V2 and the Hypertech Hyperpac. Has anyone had experience with these devices - perhaps both to provide a comparison? Pros/cons for each? Are there other devices that perform these functions?