I just can't stand strobe. I have plenty of 17mm driver boards, but the new XML light I got is 20mm high/low/strobe. I would prefer low/med/high with memory for a single 18650 (3-4.2v working voltage, 2.8-3A out).
I have extra LED's, 14 & 17mm driver boards, even 18650's if you need a fresh one, or $$. Will pay more for a good buck/boost board.