I am using Xilisoft iPod Video Converter, and I am converting a good anime series with 26 episodes. So far, I would like it at the best quality, and file sizes are a semi- major issue. I am currently converting in widescreen mp4 for the iPod Touch, and the end results will be around 7.5 GB. The RMVB files before converting is exactly 2 GB. If I decided to convert to normal 480 x 320, will the file sizes be smaller? What is the generic differences between the two? Thanks.