Which device is the 'best' is highly subjective. I think the top phones out right now are the Galaxy Nexus, Galaxy S2, Rezound, and the Razr.
Each have their strengths and weaknesses. It really depends on what your daughter likes. I'd think the S2 is more iPhone like than anything else (performance / looks wise), to prevent iPhone envy (if her friends have iPhones). The Rezound focuses on media (video/audio) quality. The Razr is simply thin as hell.