As far as which mobo is better, it depends on what you're looking for. If you want a good mobo that has onboard RAID and good onboard sound, get the Dragon +. If you want a speed demon with good overclocking potential, get the 8KHA+.
Personally, I'd probably have gotten the 8KHA+ if I knew what I know now. This mobo runs good, it just has a bunch of weird quirks.