I want to start dating site and am looking for the best software available for it.

I am ready to purchase the software as I want to deploy this on a large scale on a complete white hat method.

Apart from all the features of a dating site -member/search/etc, I am looking for something that can have:

1. Best Customer Service for future updates that may be required in future
2. Mobile/cell phone adaptability
3. SEO COMPATIBLE
4. Social Networking sites related plugins embedded

I had tried hiring someone in Elance, but it was the worst experience I had. So, I think buying a dating software would be my best bet here.

Thanks

from your post I could not understand if you already tried Chameleon dating software.
It is considered a state of the art software.