http://www.newegg.com/Product/Product.aspx?Item=N82E16827106393&cm_re=dvd-rom-_-27-106-393-_-Product
Although you just want the read feature, and not the write, the DVD writers will also read quicker at the 24x speed. The DVD-ROM maxes out at 16x. The drive I linked to above is only $12.99 so even if you don't do any writing, it is not like you are paying extra for it.