the US version of the E46 (I'm not 100% on that) which gives them more light output and a bit sharper cutoff. Also if you do the mod I was attempting to explain to 1SIKZ you can get a little better cutoff which seemed to focus the light more.
How much are you looking for for the ECEs you have?
~The question is not how far will you go...the question is do you possess the constitution and depth of faith to go as far as is needed.