You’ll be fine on a 456, Inbred or Scandal. However, for what you want, I’d go for a Scandal first, then an Inbred, then a 456. You’re on a tight budget so bear in mind that you may well need a new stem. On-Ones are long frames, designed to be used with a short stem (80mm max, I think). I’m guessing you’re aware you may also need new seatpost, front mech, BB, etc