You'll note that Fruity Chutes sells a variety of chutes that give very different descent rates for chutes of the same nominal size. The expense also varies considerably. Rocketman and others likewise. The biggest advantage to the high CD chutes that Fruity Chutes sells is the small size and light weight. But for something like an AMRAAM you have plenty of room and weight is not a huge concern, so any suitably sized chute will be fine.
I save my high dollar Fruity Chutes for my MD rockets where size and weight are a premium. I've owned a fair number over the years and have always been very pleased with their performance. I also have a large number of chutes from many other vendors – Rocketman, PML, Sky Angle, etc., and each has a fit somewhere in the fleet. PML chutes are great workhorses, Rocketman makes some very attractive chutes (like a Ringsail) and SkyAngle chutes just look majestic over a big rocket. And of course Fruity Chutes are great looking chutes.
It's hard to go wrong really, as long as the chute is suitably sized for your rocket's weight and the ground conditions. As has been mentioned, I have found the calculator on the FC site to be very good. One thing I've started doing is taking screen shots of the charts for different chutes and printing them out and putting them in the ziplock I store each chute in. Makes it a lot easier to find the right chute if I'm at the field and conditions warrant a chute change.
Tony