edit: if you want a dimmable driver and want to stick with easy AC input you're going to have to go to something in the ELN series, if you dont mind another step in construction you can do a power supply plus dimmable buckpuck configuration.
Thanks XSiVE, I was thinking that was the case. I was planning to use ELN60-48D drivers all along.
So, evil next question... Are ELN60-48D drivers available from nanotuners?