What comment service do you recommend?

I'm looking for comment service options. Here's what I have looked at so far:

Disqus: Free version displays ads. That's okay, but I want to see if there are other options.

Livefyre: I tried looking at this one, but it sent me to Adobe and I didn't know what they were offering so I gave up.

Facebook: I don't really like working with Facebook's platform and APIs.

Would you recommend building my own? The reason I'm looking for a service is because I'm not really keen on having to take care of possible security and spam issues. I have made similar things in the past and it's just not fun when people try to abuse it.

Are there other options?