there's a good news from Snapture Labs. They said that they're preparing a new accessory for iPhone which allows iPhone to have not just a Flash, but Xenon Flash.
After a while browsing at the internet, I finally found a large and deep review of the XPERIA X1 from a German website called the AreaMobile. I don't speak Germans, but thanks to Google Translate I can now summarize it and share them with all of you.