No sir, you are not qualified to give any DIN advice to anyone over the internet. Nobody is.
To the OP: It's not about DIN, it's about durability of the binding. Our sport puts a lot of abuse on the bindings: releases while skiing switch, releases upon high-impact landings, bindings hitting a rail and so on. The problem with Griffons is that they're known for their plastic construction and not known for their durability. Buying them will cost more money in the long run, because they will likely break.
The sad truth is, you're going to have to spend more money. More durable alternatives: Salomon STH 14 Driver (only the Driver version is worth buying), Marker Jester (upgraded construction with more metal, compared to Griffon), Look Pivot 14/Rossignol FKS 140 (same thing. legendary binding known for their durability).
Personally I have Jesters and two pairs of Pivot 14s. Aside from breaking the brakes of the Jesters a few times (happens on every binding really), they've held up really well.
Think of durable bindings as an investment: skis come and go, but your heavy-duty bindings hold up and you just mount them on the new pairs. My Jesters are on their fourth season now, and as strong as ever. My older pair of Pivots are on their third season, and third pair of skis now. Also good as new. I'm betting they both have another four seasons in them, especially the Pivots. That's 7-8 years with a single pair of bindings. The Griffons can't do that.