Wall fastening

A question for any DIYers out there. I'm going to be installing an Udden shelf tomorrow and I'm wondering what kind of fastening to use. Ikea are very coy in their instructions: "Choose screws and fittings that are specially suited to the material in your wall/ceiling and have sufficient holding power." Which isn't very helpful.

I was thinking of using green wall plugs and 10G x 50mm screws but that shelf only has four screw holes, which would place quite a bit of load on such fixings. I've been trying to find some specs on what you can load on such screws, without much success. Given that we'll probably be storing glases and plates on it, I'd want something that's well and truly strong enough.

Should I consider one of the more technical fixings like Dynabolts and similar? There are varieties that don't seem to need special tools, and their web site gives excellent technical and installation information, not that I know how to interpret the technical specs.

Suggestions?