The Morimotos would be better quality than the eBay ones. You can get the Morimoto from The Retrofit Source which may be cheaper as they have better discounts. They sell all the Morimoto products.
This isn't tech on this board, so it should have been in a different sub-forum. Should have been in, probably, Mustang Chit Chat. Other s have addressed the lights question already. I've nothing to add to that.