Hope you enjoy the Revo as much as I do. I just ordered the black case (night hawk) with the clip. If you buy the case and the clip as a combo you'll get a discount on the clip. If you instead purchase the clip at a later date by itself it's $24.99, if purchased as a combo with the revo case it's 19.99 (in addition to the $39.99 for the case).
I think you'll like the case because the silicone (IMHO) is not as flimsy as some other silicone cases out there. It's definitely sturdier than the otterbox silicone material. Also, I don't ever have dust accumulating under the case which is also a major plus. Here's the link to iSkin: