Thanks for the help. In the end I went with BP Blaze on my helmet, and that pushed me away from strobe or flash on my bars, so I went with Romisen RC-N3 II on my handlebars, although the 2-mode DX Aurora's were also looking pretty good... I guess the long ship and my uncertainty about Chinese quality were deciding factors, and I'm guessing the Romisen ought to be bright enough for the half-lit streets of SLC. We'll see how that goes when they get here...