[freakinvibe]

I guess you will have to move off of BES 5 anyway as support for Blackberry OS 7.1 has ended and carriers start to decommission the Blackberry subscriptions you need to operate those devices.

You can either go BES 12 with BB 10 devices or with BB Android devices.

Or, if you don't want to stick to Blackberry devices, you can use BES 12 with iOS.