Oanda and MB are OK but I never heard of nmforex... Can't even find a phone or location on the website. What do you know about them ? Ok, I see they use Best Direct from Peregrine...
Go have a look at www.forexbrokerguide.com You can see the biggest list of Forex Brokers on the net, and see them all compared side by side on a large number of very useful comparison tables. I think there are around 150 Brokers on the site.
North Finance and their 500:1 leverage.. You only asked me for brokerages so don't ask about max DDs or anything.
Make one big alphabetized list. There's a ton of them. This took me along time to find and post so you need to help me when I need it. Reviews & contacts here: http://www.forexpeacearmy.com/public/forex_broker_reviews http://www.earnforex.com/articles/choosing_the_right_forex_broker.php
Felix Homogratus.....deletes opinions if they do not agree with his! Take the above mentioned link, "FOREXPEACEARMY" with a grain of salt.