It was the 119 Haiku that made me change my mind about the light. My first foray into a Haiku XR-E ended with me selling it, but when I got my present Haiku I never looked back. Really missing it lately but I'm so spoiled by the low and high of my Rotary 170N, which I'd really like to get from the Haiku as well, that I started considering which way to go.The standard Tana LE with Tana's own firmware (guppydrv style, Tana3) is also a good option.
For me, a lower low might be nice to have but I don't require a higher high in a McGizmo as I find the 3S adequate and also don't wish to chew through the battery quickly or generate too much heat.
One thing worth mentioning is that the 3S (and Hive) function great on primary and liion where a Tana LE will be liion only.
I'm sure you'll enjoy your Haiku whatever the LE but those 119 Don has are magic, I hope for everyone's sake he has a large supply as to me the B and C has not yet surpassed the McGizmo 119A for a pleasing beam.
Would be preferable to keep the battery options open, but I've really only been using Li-on for years now. I think the only primary only light I've even got in service is my Maus.