If you never really use them to rush buildings or jobs, I'd get the Squeaky Voiced Teen. But then gain, you can get him from a Mystery Box if EA ever decides to let us get something other then a Parki...
Since my OP I obtained 2 more donuts, for a total of 33. I decided to spend on 1 Buddha and 3 mystery boxes. I thought I'd share my results so others can get an idea of what they can expect.