I've got a set of Terra 2's and a Magicshine 808, the one without the mickey mouse ears (and a rear 818) on my bike.
Terra 2's are nice and bright, battery lasts for ages. I use them as my daylight running lamps :-) They're no where near as bright as the MJ, and if you're going to be on unlit roads at night, you won't be able to bomb along full power as you won't be able to see far enough ahead to go much faster than 20 mph. The MJ front lights on full power drain battery fast, couple of hours if that.
They're also well built, (although the wire is a bit cheap). The Magicshine stuff is cheaply made in comparison, plastic, rubber rings for mounts, but the light output is good.
If you wanna video to have a look at my lights I can put one together.