What;s the best driver for these LED's?

[nlreefguy]

I'm putting some LED's over a small frag tank - 4 XM-L Crees, to be exact. I was just wondering what's the best driver for this application? Since it's only 4 of them, the meanwell's I'd usually use seem like a bit of overkill and I'm not sure they would even work. Any dimmable smaller driver suited for this application? Thanks. Oh, where would I get one, by the way?