Hi, I would like to buy some cheap(ish) budget shuttles, and I would like to order them from SportsDirect.com. The ones I am looking at are the AS10, AS20 and the Carlton GT4 and GT3. But which one of these would be the best choice? Here's more info; I would need Speed 79, these are for use with junior players (14/15 yo), and with beginners, so durability would have to be average. Thanks in advance.