Hope that you have a 6x 8650 battery pack with that light, and not a 4 x 8650 battery pack.
Front lights, I have a Fenix BT20 for road use use. The light is too yellow to give clear definition off road, but this colouring makes it very good for road use.
For off road use, I have a 4 cree 5200lm light that I bought, used once, then stashed away in the back of a cupboard never to be used again, as I prefer using two in number 1 cree 1,800lm lights. Unless the ride is fast downhill, I only ever operate one light at a time though, as I find that just one lamp gives more than enough light for my use. I also use 6 x 8650 battery packs with both lights, as the 4x packs struggle to last an evening of riding.
On the rear, I just one of these.
http://www.ebay.co.uk/itm/LED-Waterproof-Bicycle-Cycling-Front-Rear-Tail-Helmet-Red-Flash-Lights-Safety-Wa-/131370047182?var=&hash=item1e9643d6ce Cheap as chips, and do the job perfectly. You do have to tighten/check the screw that fastens the rubber strap though. I didn't figure that one out until two lights later!
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