I did that and also used the e-spec lamp housing. Not only is it far brighter, but it has a much better focus pattern due to the housing. $38 for the housing and $32 for a pair of bulbs (leaving you a spare) from Susquehanna Motorsports.
I have this setup with the Hella 80/100w bulb and can attest that it is a quantum leap in illumination and pattern-quality compared to stock. It is also a very inexpensive upgrade.