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Just out of curiosity...how old are the 3 unsecured?? Who are they with? Do they have yearly fees?
You made a wise move with NFCU. I'm guessing your scores are a little low right now, hence the secured card. If you have the funds, I'd add another $3500 to NFCU to give you a limit of 5k which is a great starting amount and put some of the other $$ in a savings acct with them. Building a baseline relationship with them will certainly benefit you in the long run. They're likely to unsecure that card in (guesstimate) a year.
edit typo