i thought A40 is abt $20-$21 at bras basah, abt the same as flymax. flymax flight is lesser that of A40.
i have tried flymax during one of my friendly-match ... and i dont like it ... you could try pro-tec or s-arrow ... they are quite good and durable ... but personally, i like yonex AS-40 (i like to hear the crispy sound when you smash the shuttles)