I'm planning on getting the two Underworld movies and was wondering which ones to get, the US releases from Sony or the UK ones from EIV? My understanding is the US releases have superior sound. However I cannot find any comparisons regarding picture quality. The UK releases can be picked up for around £9 each, whilst the US are almost double the cost. For this reason I would like to hear any comments from people who have been able to compare the releases against each other. If the US releases do have superior PQ, is there enough difference to justify spending twice thhe money?