Following 2 oldhams, a Miles Cree Wonderlamp (plastic lens thing) which I took into Tywarnhayle with RM (Trigon) and RF (Magnumstar), I thought my lamp was broken. I picked up a Trigon and have recently (hearing RF was discontinuing oldham conversions) augmented that with a Magnumstar (as he had his own one S/H...I would have had another Trigon).
Anyway, the Trigon is a hell of a tool it's like the turbo version of the normal lights, without being a dragster (with the associated unreliability, caining batteries, etc).
I was cycling to weirdybeardies from Carharrack to Comford and was overtaken by a VW Passat (newish). I wouldn't say he chucked a shadow, but my head torch was most certainly brighter. I do use the loud settings quite a lot, just for a quick photo (daytime mode on camera) or for seeing detail somewhere huge or dark-rocked.
I was looking forward to the MS and it's a different animal looks wise, it's like something Lamborghini would come up with if they made head torches. I was expecting even more of the same and was mildly disappointed by "more than enough light".
The trigon lights everything up enough, the MS just makes your pupils go smaller for the same result!
I do very much like my RF lamps and if I had to buy something with not-an-oldham, I'd be more interested in light quality and would consider a Scurion (I don't like wasting money, but they do seem quite good). It would probably be a toss up between a loud scurion and whatever RF is building now in the 2000L order.
The light from the Scurion I was with the other day was very very crisp. Everything seemed to be in high definition, like the point source was very "pointy" (if you catch my drift). This was a good thing.
What is important for me is longevity. I like the idea of carrying a big battery around, because I don't want the firkyfoodling of playing around with batteries and connectors, having seen my chum struggle with his Speleo Nova.
I think I would quit the hobby if I had to go back to an oldham. I went on a dig a while ago and used my mates oldham and had a headache when I came out. I realised this was due to eye strain!