I should disagree with you. Open Trade is one of the most professional websites I've ever seen. They publish their own realtime forex rates right on their website and they are more open to their customers. The rates offered are very reasonable and are not low. Such rates are normal for Forex trading. Run away from those who offer higher than 2.5% daily.
Regarding the two sites you mentioned:
"Forexers" have no information about what their business and their numbers seem to bee fake as they do not publish any detailed statistics as Open Trade does. One can take real-time statistics only from a bank through which the company trades on Forex market. Besides the site itself looks very unprofessional.
"Forex-united" seems to me suspicious as the "maximum deposit accepted" is only $3000. That's noncense for forex trading
The magority of serious forex trading companies do not limit the investments of their customers. Probably they do not want to get more money from one customer in order not to pay high daily profit and to keep their ponzi website working??
So, according to my personal DD Open Trade is one of the most professional forex traders presented in the internet. I have no doubt they will be the largest long-term investment program here