Should I swich my son's preschool?

[tiny cat]

My 3 year old son has been attending a toddler program/preschool since he was a year and half. The school is very close to our house and I love the convenience. Most of all, my son really seems happy at school and learning a lot.

Since he's old enough to apply to other preschools this winter, I started seeking other options for his school. I applied him to this preshool which is known as 'a feeder school' to the best private school in the area. Last week we received an acceptance letter from the school. I was really excited for him, because the school is pretty difficult to get in.

Now my husband and I have to make a decision in a few days if we should switch his school. Why would we move a perfectly happy child to another school? We've heard great things about the feeder school, but it's risky because we don't know if our son will be happy there. But we really want to increase the chance of his getting into the best private school in the future. Any good advice?