4900 is different chip and was a beast, X5 is Quad Core processor and have newer codecs build-in so it would be little better then 4900. but for me 4900 has its own spot.
@harvey burgess your telling me about shipping cost, we are reviewing the box and how it plays and not dealing with customer do not like the unit and nothing wrong and must pay for shipping. There are ton of websites selling these units and we always recommend Amazon and official websites. Again we don't talk about shipping issues. That is not US we are not buzztv. What you did has nothing to do with our video. Keep your issues with shipping cost on return policy to your self. When we cover these parts then bring hate under our video.