Wow... some of the eLEDs had N-bins in them? That's awful. I recently bought one and the tint is very nice... slightly green-ish yellow, but only very slightly. I was all set to upgrade it, but to be honest, I like the tint so much, I'll probably just stick with it unless I can find a really nice T**H Lux III side emitter.
Since the board seems to be constant current, you could use a Lux III and the output and runtime would be about the same as the equilavent... ie, a Lux III T-bin would be the same as a Lux I R-bin.