To put spacers on all four wheels it will cost you $200 + shipping and tax. To buy new wheels with special offsets will cost you about 250 - 280 with shipping and tax. To know you are safe going down the road without spacers priceless.
When I bought my new wheels, I didn't figure the offset right and ended up using the spacers as well. I'm happy with them, but next time I'll just buy wheels with more offset like JHS suggests. If you do go with spacers now, Petroworks has new ones that are 1 1/4".