You'll notice some folks on the forum saying not so good things about Italeri kits. I don't know if thats because of Italeri's close association with Testors (who's kits I wouldn't recomend to anybody) or for some reason to do with Italeri themselves, but I've found a number of kits in their range that would be suitable for beginers, their 1/72 T-45 Goshawk, 1/72 Harrier GR.5, 1/72 Panavia Tornados and 1/72 Eurofighter kits would all be good for beginers.
Revell Germany also makes some good stuff that can be recomended for beginers, their 1/72 Vickers Challenger tank is a breeze to build and the detail is great for the scale, most of their 1/72 aircraft are also good for beginers to work with.
I find that both Italeri and Revell Germany kits come at a good price that won't come back to haunt you if you mess up.
I've been building a few Academy 1/72 kits lately and am generally impressed with what came out of the box. I've got their 1/72 A-37 Dragonfly and OV-10 Bronco on the go and they fit well,have some nice recessed panel lines and the instructions are nice and clear. A beginer should be able to handle them without too much dificulty