Been with OPEN E CRY for trading ES, DAX and NIKKEI.. for over a yr now. Experience with them has been very positive. ES right now still $500 day margin and $2500 mainteance margin for those of you with lighter pockets. I trade 50-100 contracts per position. Their fills are very good from my experience with them. I do use MB TRADING for my forex trading( they do ES minis too) but their margin is like over $1500 per contract during the day.
