I like bonnet mounts, some think they obscure the view but I don't agree, minimal difference imho, makes the bonnet harder to lift but that's all. Make sure you get a later one with the locking pin, or the defender one is much better.
You could move the mount on the back door, I think that's why some of them had the mounts lower down.
No idea if it will fit in the dip though, my s1 has it on the bonnet but the bonnet has no dip. Only other issue I can think of but is more s1 related, if you drive with the windscreen down and a 7.50 the supports don't quite reach the bonnet catches