You may want to go to
www.subydude.com and sign up for their newsletter. They always offer Rota wheels with tires mounted and balanced for a package deal, but periodically, they email me when they have a special where they throw in lug nuts (which you should get) and a shirt or somthing for free.
Rotas aren't the lightest wheels, but they're a lot lighter than most wheels that cost ~$150 each and they come in the proper size (and more importantly the wierd Suby offset).