Preschools in Frisco

We are moving to Frisco from NJ in Sept.Can anyone tell me a good preschool in the area, even in Plano that is more than just daycare. Also will it be too late to enroll my daughter in a preshool. She will be a month shy or 3 years old. Not sure if it's the same there as here but the preschool she would have gone to here was allowing her to go in with the 3yr olds. Any help would be greatly appreciated. Lastly, any thoughts on Montessori schools?