Is 1GB per month enough?

I'm currently getting a new phone (HTC Windows Phone 8X) and contract and I have the option between 1 GB or 2. I was wondering is that enough? if you have that allowance on your contract, do you ever go over it or feel like your throttling your usage? Few notes on what my usage.I would store all of my music locally and only stream a couple 8tracks playlists.I am liberal with browsing the especially youtube. Thoughts?