Best Subscription Plugin

Ok, I have a new blog up and running. What I would like to have is a sidebar widget that will let folks subscribe to my blog, that’s it, nothing fancy. The problem is, when I search for a pluging to do just that, I get a ton of plugins to go through, and none of them seem to do what I want, which is just the above description. Nothing fancy, just that. It would be nice if they could sign up for follow up comments to a post too, if possible. Can someone reccommend a good plugin that will make a widget so folks can subscribe to my blog?

Terry