When installing graphics cards and other expansion cards, the maximum length of these in the CM 690 II Advanced case is 30cm. This means that cards like the Radeon 5970, with its 31.75cm, doesn't fit. Removing the bottom hard drive cage probably won't solve this, as the cards will hit the top hard drive cage as well. Fitting a Radeon 5870 is no problem with its 28,2cm, and there's even room for a SLI/CrossfireX setup.
The option for cable management in the CM 690 II Advanced case is good, and Cooler Master has spend a lot of time designing the back which features a nice pattern.
The 140mm front fan has built-in LED's emitting a blue light. The light is very clear in both day and night time, and can be disabled by pressing the button on the front panel.