There probably isn't one best format to use so here is what i'm trying to accomplish. I have copied all my DVD disks using Aimersoft DVD RIpper with the Lossless DVD format. I store them on my External Hardrives and I stream them to all my computers and TV's through out my house using such devices as my Computers, PS3, Wii and Western Digital Live TV Media Streamers. My girlfriend can stream her shows on the bedroom TV upstairs while i stream something else in the living room. Everything looks great and the quality is great however my hard drives get filled up fast when i use this format. The files are from 4 to 8GB for each movie. And my TV show series are a lot more than that. I was wondering if there is a better video format that i could use that wouldn't lose that much quality(if any) but give me a lot smaller video file size and also would still be good for streaming? Thanks for your advice!