Don't be in such a rush to get more birds. You are still learning how to take care of your Bobwhites properly and still asking a lot of basic questions. Get a couple of more years of experience with them before adding more birds.
If you absolutely can't make yourself wait, and your parents agree to you getting another type of bird, go with coturnix. They are a good beginner bird -- and you are still a beginner at quail keeping. Get a couple of years worth of experience with them, and THEN think about something more than that.
You said you have some cages on hand. What type of cages do you have that you are wanting to use for the new quail that you want?