I have used the 3w blue leds and they work well, but I don't have any Royal Blues to compare with, but there is some info on nano-reef's that the two are almost identical. I am using the Sure drivers, cheap and seem to work well, but do get quite warm when run at close to capacity.
the leds are on a nano reef so just using a 24v laptop powersupply. The sure drivers are quite forgiving for voltage and you have a wide range depending on number of LEDS used.
http://cgi.ebay.com/3w-LED-Driver-MB...item3a6442f9f3