HighPoint has been in the storage controller industry for over 10 years now and their products just keep getting better and better. From their beginnings of supplying chips for ABITs high-end motherboards, to providing their own controller cards, there is a HighPoint controller for any market.
The RocketRAID 2640X4 controller is extremely well designed. While it does require a x4 slot to work, most users who would want this board will have a spare x16 slot or a universal slot. The controller lacks onboard cache, but this would add to the cost of the controller which HighPoint is trying to keep down.