Hmmm....
A Green cheek conure might work, not overly loud, like to play and can be handled by most people, not small like a budgie around Tiel size.
Pi's are nice birds, but I don't think they are the most active - will have to wait for Pi owners to answer that one.
Indian ringnecks that are handfed can be very nice as well. Larger than the GCC and quite active - not always real cuddly but they can be quite sweet when they want to be, pretty independent, can learn to talk, not too loud most of the time and well you can't beat how pretty they are.
However, I am a little biased on the one.
Ekkie are going to require a little bigger cage than a ringneck, Pi or GCC - something to keep in mind and will be much more expensive as well.
So budget might be another thing to think about as well. What is a comfortable amount to spend on the purchase of the bird..