The cheapest option is to buy aftermarket headlights. Around $600 for decent projector based headlights with LED halo's. Pretty crappy projector quality though, and you would want to upgrade that. So look at $800 for something good. Almost half the price and to OEM.
Look at it this way, iPad vs. Kindle Fire (Both do the same thing, but iPad is better for more, but is it worth it?). Just giving you your options.