I think is better stay on 1.5 version and run a lot of homebrew software. I enjoy playing donkey Kong Country on snes emulator and Sonic on genessis emulator and of course enjoy the psp games... so I don't need the upgrade, but there are new programs that give access with the 2.6 to play hombrew like fanjita's loader, i don't check it, but some people say that this software helps to run emulators and hundreds of programs... maybe if this works only if it works we can upgrade our systems.