HI!
If you were my patient, I would advise you that there is probably about a 90% chance that your new baby will be vertex (head first) and at least a 70% chance that you can deliver her naturally without the need for c section.
There is a chance (since your son was breech) that you have abnormally shaped uterus--eg a septum or heart-shaped uterus. If that is the case you may end up with a repeat C-section. By that time, you will be so miserable, you won't mind either way! =)
Good luck!
Dr B
Thankyou :) that was an insight to keep in mind. Ill let you know how we go.