I don't think I'd be happy using one of those where there's no street lighting. For that you need something to see by as well as be seen by others.
There's been much chat about lights on various threads. If you do a search, loads of information should come up.
For me, if money was no object, I'd be wanting some AyUps
http://www.ayup.com.au/uk-shop-kits.html
But as money is an object, this is my current set-up of front lights:
2 x Cateye EL530s (shopped around & got two for the price of one effectively)
Lid-mounted LED headtorch (I look a right twit, but hey, it gets me noticed which is a good thing)
Where I live, any night time riding is almost all on unlit roads. The two EL530s together flood the road ahead with light for a decent distance (I don't ride fast though) so I can see well. The lid-mounted LED is *brilliant* at lighting up road signs, street signs, and most importantly, for letting oncoming drivers know you are there. I think it may be the WTFIT? factor at work. Excellent for getting oncoming drivers to dip headlights promptly too. I found a noticeable difference in how soon oncoming drivers dipped headlights when I started using a lid-mounted LED. They do it much sooner. For those who forget - a swift and brief aim of LED headtorch to where the driver is located tends to do the trick..