I've been using a dewalt hammer drill( not cordless) for about 6 years and have been more than happy with it. The only problem I've had is with the chuck recently not locking onto the SDS bit but it was still completely usable and is only in being fixed at the moment because I happened to be passing their service centre.

After using a few brands of cordless I've been looking at what brand would be best to go with from now on. After checking the websites of the various brands I've been most impressed with the industry support from Makita in Australia.