What are your limits on each card, their utilization, and your all over utilization rate? What is the age of your accounts? Your scores aren't strong enough for Amex yet, and if your accounts are all from the last two years, your accounts are very young. I'd garden for at least six months (to let your accounts age) and then see where your FICO score are sitting at. Go search the approval threads for AMEX approvals, and you'll get an idea of where you'll need to be at for approval.
