Thanks for those who have reached out directly or added commentary to this posting.
Black units are still available from a handful of sources and make a fine alternative, but I'm moving away from black on this build and the silver is an iconic look for the Hillibikes IMO.
@Garth, yes the MX70's are available for a fair price as well, we have a pair on my wife's Platypus and they are a fine unit but for whatever reason I find the BR-T610 profile more pleasing.
I have a used pair on the way but would like to bump this listing in hopes of finding another pair to compare and hopefully shelf for later use, so if you have a pair of these silver BR-T610's please don't hesitate to reach out.
Thanks all and be well :)