[PatK]

There's quite a few favourites here. Just wanted to mention that if you need brackets as emphasis, then it's likely the logo isn't strong enough. Colour is a nice emphasis, but this kind of logo will have to stand on it's own with or without it. I have noted not many examples of letter scaling, try reducing the obvious letter 'O' or scaling up the ends to create innovative designs that catch the eye while still coming off readable. A lot more possibilities available, better to have some crude sketch, with freshness over an overworked weak design.