Congrats for even considering a BB. I had NO problem transferring all my iTunes music to my BB.
When iPhone people have an open mind and try a Z30, they are usually pleasantly surprised.
Here are the two most recent higher profile examples, note : they both mention "lack of apps", however with the new release of the most recent BB OS 10.2, the app gap is addressed as BB now has the ability to run Android apps (I run Netflix, Starbucks, Tapatalk, F1 apps and a bunch of other lesser known android apps and they work great!)
USA Today tech writer compares her iPhone to a Z30 :
"
This is a fantastic phone!" (video)
And another review from tech writer iPhone owner DadDoes.com :
[video=youtube;9gdU6H5sCrI]http://www.youtube.com/watch?v=9gdU6H5sCrI[/video]