J.,
Obviously, it's up to you as a couple. But I'm sure you know that.
For me, I wanted it to be in my control. That's the only reason. When I talked about a tubal with my doctors when I was first pregnant with our second son, BOTH of them (men) said it's easier for my husband to get something done. They even offered to talk to him about it if it was an issue. It wasn't an issue at all. My husband said he would get it done.
As it turned out, I was scheduled to get my tubes tied after delivery, but I couldn't due to some minor complications. I called after to make the appointment and I cried when I made the call. I wasn't ready to make it permanent. SO, I've opted for an IUD. It gives me the freedom of no pill but the option to change my mind. Again, control of my own body.
That's my story and it has worked out well for us.
Good luck and congrats on #2. :)
T.