I wouln't even consider a Sea&Sea strobe, I have had D1, D2 and D2J, one of those D2J are still working fine, as spare. The other 5 I owned and the 4 of my dive budy died. Never again. That said, Retra plays in another league but they are not free of issues. In another forum someone reported a 2 retra strobes fail at the same time in a deep dive, one of my dive buddies have flooded one of them, and not by the batteries cap, so the strobe died after the warranty. After being working flawlesly more than 2 years. This doesn't mean the other brands are free os issues. I am running Subtronic 160 pro right now, one of them has gone twice to the factory for repairing, the factory response has been fast and right, but the issue was there. I can't talk of other premier league strobes but as far as I know they all work with dedicated batteries, which is for me a handicap and a point extra for the retra's. For me only one thing is clear, Sea&Sea never ever.