I really want to get a windows phone (from Android), but should I wait for WP10? So I was thinking of getting the Nokia Lumia 930. It's a good phone with nice specs and features and I can get it for around AUD $400. But I don't want to get it just yet because I have a feeling Microsoft is going to announce/release new phones for their Windows 10 release. Is it worth waiting? I'd rather get a newer, better phone for slightly more. 

I don't really want to get anything that's too expensive, AUD $650 is probably my maximum. 

One last thing: does Cortana have full functionality outside of the US?