I use a Suunto MC1G Global, The reason is that it has the global needle that will work properly anywhere in the world and because it is a very reliable, well made compass.
http://www.thecompassstore.com/sumcmimeco.html

I have an old (1970's) Silva Ranger that I used for many years but eventually got a bubble inside that kept getting larger until I retired it. I did not buy another Silva because the name Silva in the US now belongs to a different company than Silva Sweden and the compasses Silva USA sells are nothing like the genuine Silva compass. Most of the Silvas sold now in the US are made in Asia and are just not that good. The Brunton compasses sold in the US are made by Silva Sweden and are excellent. So, the choice for me is Suunto or Brunton.