All of the above are good recomendations, I've had the 10w Sartek from new and it was a good torch for the money, I then bought a 2nd hand 21w salvo with I currently still own, and that's good too. I still think HID has it on price V performance compared to LED just now, but the gap is getting narrower every couple of months. If I was doing it again and had your budget to start with I would go for the 2nd hand Salvo, after diving next to one you will only want to up grade anyway
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James