Sightstone Enchantments. Looking for ideas.

I'm definitely creating this thread because of a suggestion that I made on an other thread suggesting that Sightstone be removed from the game, which is absurd. It seemed that he didn't understand the necessity of the Sightstone, and my intention definitely isn't to harp on them here, but to offer a suggestion to help make this item more of an obvious choice.

As you can probably tell from the title, my idea involves using Riot's newest favorite way to improve the Jungle experience, by adding enchantments. Riot has already started this idea by offering the Ruby Sightstone, however this doesn't really compliment as many supports as I would like to see.

I would like some help in the concept here though. I am looking for your suggestions for what type of enchantments would be good here. How much gold value do you think these enchantments should provide while maintaining balance? Currently the Ruby Sightstone provides 400 additional HP, which has a gold value of 1067g (according to the League of Legends Wiki). Should this value be increased in order to add more value to these other enchantments?

For example, I would like to see an enchantment that would increase movement speed, or maybe one to increase mana regeneration. What do you think?