You can find some petty decent reviews for most lights here
http://reviews.mtbr.com/2014-mtbr-bike-lights-shootout (2014 model year lights) and here
http://reviews.mtbr.com/2013-bike-lights-shootout (2013 model year lights).
There are a host of new manufacturers that make very good lights at prices competitive with MS. The MS lights are decent to good but their batteries don't last. You could replace the battery with a high capacity and quality battery from Openlightsystems if yu go with a MS light.
Generally people prefer to have a flood light on the bars and a spot light on the helmet. Some lights are so powerful that it doesn't matter. Spot lights are best for the road when going fasterand flood lights for side visibility when riding singletrack.
Dinotte is about the best value for money (the XLM-3 makes an honest 1550 lumens, has a great beam pattern and goes for only $219).
L&M produce lights with the best beam patterns and the Tazz series is great for as handlebar lights. I prefer the convenience of a cordless light for the light I mount on the bike.
The Cateye Volt 1200 is an awesome new light. Leave the mount on the handlebar ad you can just clip in/out like with your Garmin device when you want to ride.
I really like the Gloworm stuff. I have the X2 v2 (the v3 makes 1500 lumens this year and they have 2200 lumen model available now too). For the new models, like the Gemini's, the user can set his own output levels for Low, Medium and High. You can decide how much run time you want out of your light.
Lots of sales going on now on the 2013 model year lights.
