I know it may sound harsh but are these people going to be your friends for life? Probably not, therefore it isn't advisable to base your future around them although its comforting. Absolutely go for the elite places, you've got the grades, may as well put them to good use especially in more prestigious places where the quality of teaching and resources are likely to be much higher. More elitist places are more likely to have better links to cities and industries in terms of jobs so you could benefit by gaining work experience and it'll look better to employers if you attended a well known sixth form. Overall, spread your wings, you can't stay in one place all your life, you'll more than likely work in many different places so don't be wary of the distance and newness.