if you are going for SGS2 then i will advice you to just try hd7 its a good phone i owned it and loved it but really truly speaking as my preferences i highly depend on the apps i need apps daily . i download 20 to 30 apps daily while doing my breakfast
its my daily routine and for that purpose i strongly recommend Android or IOS but Andriod apps are less in size as compare to IOS and quality too . WP7 Is very nice OS very organized and truly different than other OS available but wp7 lacks apps games but it has many necessary apps we want in daily use
wp7 highly depend on zune just like itunes but i must assure u wp7 is also smooth just like IOS no laging no hardware requirement **** involes in it
and i hope after nokia announcement the number of apps will increase and more developers will take interest into this OS
Nokia is still a giant right ? 