Take a look at Circa Lighting. They have a large selection of pendant lights with both clear, prismatic and milk glass shades. I would suggest going with a different shape than the RH light - something like the small Hicks Pendant or the Garey Small hanging pendant. Both have a great shape (I particularly love the chrome or nickel fittings on the Hicks fixture) and both have glass that obscures the light bulb. Look for something that gives you 100 watts of lights and install a dimmer so you can adjust the light as needed.

Actually Restoration Hardware drum fixture cost $595 not such a cheap. There is $169.99 pendant you might like.

The proportion of the pendant lights does not look quite right to me. I think that you might find a better balance with abilliard/pool table type of fixture
or an island fixture, such as the ones in the photos. If you do stick with individual pendant lights, I'd hang them a little lower.

Maybe you can save some bucks and just do a spray frost on your current pendants.