I think I have bought 15x XM-L2 U2 1A (on Noctigon) within the last 2-3 months. XM-L2 U2 1A is actually the emitter I have bought the highest quantity off. But I mostly buy it for the purpose of de-doming, mixing with other emitters (domed or de-domed) or if someone just want a bright "wow" light from me. Im not much of a (domed) 1A user, gotta admit that.
My "philosopy" is either way that when I do a build and use a lot of time and money on it, I don't bother saving a little bit in order to not get the top of the line bin. And since im using copper mcpcbs in basically all my lights, it does not make much sense to buy T6 on alu + bare Noctigon when I can get U2 mounted on Noctigon for a good price from a source that is reliable, credible, and with good customer support for pretty much the same price, if not just marginally more.
You project sounds interesting and I can see that you have different needs and preferences compared to me. Will there be a build thread or something? :)