A good support is really necessary in some Forex broker your account manager will regularly call you will ask if you are having some problem or if you can't reach by, you will get an email. So, when you get some problem it can be solved very fast.
To be honest with you forex traders don't check that while seeking pr searching for a broker they do go for those that offers bonus or brokers that has forec paid to post forum,likewise me thats what i do as well,so finding a broker with good account manager isn't onlist anylonger.