Best Value Road Bike for £ 500

Casbar Posts: 168
edited July 2011 in Road buying advice
I want to buy my son a road bike. The budget is £ 500

We are currently looking at a Spech Allez entry level

I have 2 questions

Which bike in your opinion is the best value for money ?

He is 16 and size 54 fits him best. Do I go for a 56 and make sure that it still fits him in one year ?

Thx for any advice