I think you have a nice portfolio of cards there. With the exception of the Cap One that won't grow, I'd keep them if there is no annual fee. If you have a fee, then I'd keep it till the new AF is about to post. Me personally- I'd look to getting possibly one more card that can grow. Maybe an Amex or Chase after gardening 6 mo to a year. Should be able to acquire a nice starting limit then.
Starting Score: 642