Well I took the plunge and went for the Falkens.
I understand they are the same as Falken Rocky Mountain AT tyres over in the US?
Nothing bad to say about them. They are noiser than the Michelin's but that is to be expected as these have a rediculous amount of tread on them, and they are Light Truck construction tyres with a 10ply sidewall.
Overall, very happy so far, with 500km under their belt.
PS. I managed to fit them in the spare wheel well, but it had to be deflated. The lid pretty much closes flush - sits about 5mm up.