Why offer advise on getting a Blackberry when all of your data is stored in Canada.
If you're going to worry about using a custom ROM that might be a potential security threat, then why are you not worrying about that?
After all, we all know how close Canada is to those pesky Americans that want all of our bank account details:
http://www.timesonline.co.uk/tol/news/uk/crime/article6945972.ece
Lol do you know how blackberries work??? Out of all the platforms out there it's the most secure....why do u think major companies/corps use bb's as their communication devices??? Secondly all the data from BB's are encrypted so even RIM, the manufacturers of bb devices don't even have access to that data....the UAE and Indian govts want access to that data and RIM can't give them that as they don't have the encryption keys to give....that's why BB's are widely known as the most secure mobile devices around.
Also the Canadian banking is regarded as the most stable banking system in the world....hell Obama himself praised the Canadian banking system a yr or so ago...while the American and British banking system were going into meltdown, the Canadian banking system didn't get that affected.
http://www.bloomberg.com/apps/news?pid=newsarchive&sid=afWw27XA56jM
Just a bit of info for you so that in the future you know what your talking about.
As for this whole iPhone and android argument?....each to their own is all I have to say...I prefer the iPhone over android....my last 2 android handsets didn't last more than a month with me whereas the iphone4 I've had since aug and not once has it bored me
