Stewart, there's lots of ways and remittance organisations to send money.
It does depend on how much you want to send and how the recipient wants to receive.
For a long time now we've used iRemit simply because it suits us.
Everyone will tell you their preferred method/company is best.
I would suggest you do a quick search here on the numerous threads about sending money and find something thats best for you.
My best advice is to settle on one where the total overall costs are acceptable and the organisation is reputable.
Remember it's not just about charges etc, look to the exchange rates too
iRemit are always very very close to interbank rate.