Have had an SF M6 for over 4 years now and is still my best torch. Like you, waiting on Dominator 10x upgrade. M6 pro=can keep reloading batteries for continuous illumination for hours if ever needed. Dominator 10x must be recharged each time unless you purchased a few extra batteries. So not as useful for long burn times unless at lower illumination. SF M6 500 and 250 Lumen bulbs are real easy to change out. Batteries are $1.75 ea @SF, depending on your use, I think that is reasonable. Dominator 10x, I've always liked the idea of having extended low 60L for 3hrs and press button once presto over 500L of blinding flood light. Al, don't you have both M6 and dominator? They are both great lights depending on your purpose.