hello, this is my first post on here:-)

I am moving up from a LX3 camera and looking into getting a digital slr. I am getting marriedin october and am getting one of my freinds to be the photographer for me, ( he is quite experienced)
My thought is i am going to buy the camera, lenses, flash etc etc and he will use the kit duringthe day. I do have a budget but it is not set in stone.... the choices i have made so far are based on using for the wedding but allso for holidays, landscape, wildlife etc etc.

Nikon d90 + 18-55mm vr

Sigma 10-20mm 3.5 ex dc hsm lens

Nikon 70-300mm f4-5.6g af-s vr if-ed lens

Would anyone say this choice is a good idea? or are those lenses completly wrong? If anyone can recomend swapping any of them for any othger lens?