"If you are just doing voip and games you may get some of the speaker getting picked up, but not if it is not too loud. You are fine there. If you were planning on doing more with it then I would go the other route and use headphones or place it away from the speakers." previous thread.
I really think you will be fine with the blue snowball. It is designed for podcasts and the like and if you are not blasting the speakers it will work just fine. For the little bit that will be picked up I don't think it will be noticeable. My only concern previously was if you were recording the speakers would end up in your recording. For what you are doing this is a good mic.