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Online Foreign Exchange Brokerages: Which ones are good & reputable for smaller trades? 
I used XE trade once several years ago. I found them quite easy to use after the slightly fiddly account setup process (needed for security/anti-money laundering I think). I trusted them because I'd been using their online FX rates for a long time. I can't really comment on the specific questions you ask though as this was a long time ago and I haven't needed one since.