Michael
I Love YTtalk
Remember a network isn't necessary, double check what they are going to be giving you for your money, and make sure you will NEED it. Beware that in some cases the music and sound effects you get if you leave the network can cause copyright claims to pop up on multiple videos of yours for the music back. (I have only heard of this word of mouth, but it's worth thinking about)
You get those issues even while partnered by the networks offering music etc with claims on the video and the need to dispute it, it also happens with music you purchase too, it is a pain at times but at least when you buy it yourself you have your license to show when it is asked for