I pondered what I would get in relation to standard and wide optics if I went with 2x 600Ls on the bar. I still don't know the answer, but your beam shot pic helps a lot. I like them mounted under the bar and it seems it might protect them more in the event of a wreck. I'm also still considering the Dinotte tail light, but I don't know if it is necessary as I have two PB Superflashes and one 7 led Vistalite Eclipse which so far have done the job. Obviously the dinotte tail light will blow them away, but due to the relatively short run time of the Dinotte tail light it would mean a lot more charging whereas the superflashes last quite a while before I throw fresh batteries in them.
Anyway back to the 600Ls. I think in my case I would go with one wide and one standard due to the fact that I already have the Wilma helmet mounted. The Dinotte standard beam seems very similar to the Wilma beam. So I think If I had one 600L wide and one standard lens and the Wilma thrown in then it would give a similar beam pattern to yours, but also with more light wider and up close also. Shouldn't be to much different then having 3x 600Ls with a standard on the helmet and one wide and one standard on the bars. Maybe Santa will leave some Dinottes under my tree this year.