I just wanted to add, that whilst a reasonable commute & (obvs) schools are clearly v important factors - don't forget about yourself! You also want to be in a good, family friendly, community with access to parks, playgroups and other mums with younger family members too. Some places which are a good commute are not so family friendly - I remember when we were looking & some places which were a walk to work for my hubby felt like ghost towns & were very unfamily-friendly.
We plumped for BTC because of the amount of things it has to offer families & we have not regretted one bit. Hubby can cycle / run / public transport to & from work & gets home to a happy (& not lonely) wife, exhausted kids from all the activities on offer, all safe in the knowledge that we also have great schools too. If you get the location right, you can use the school placement services to help with finding you a school, am pretty sure they will have lots of advice, tips & ways to help you. I have heard numerous stories about how a begging telephone call to (only applies to Private schools I am afraid) a school has resulted in 'one more' being squeezed in. State schools operate a waiting list & the key there is to be as physically near to your chosen school as possible as distance is the number one factor regarding those.
Good luck!