Airbike SL2 on my bars (P7 LED just like the DX light) and a DX P7 torch on my head…
LOADS of light when I need it, but mostly I just run with the Airbike on it's low or mid setting and the torch on my head off. Until I get to some technical bits, or a DH run, and I can switch both on full power and have loads of light everywhere…
Yeah, the P7's aren't the most focussed, but I tell you what, you'd have to be travelling pretty bloody fast to outrun 2 of them on full power that have been aimed right (aim has the single biggest effect on how useful a light is!). I'd love to try a troutelight though, just to see what it's like by comparison…