hey guyz i have a little doubt i wanna know whats de difference between a combo and a dvd writer is combo any good?coz one of my friend is sick of it n says it totally sucks so if a combo is good which one should i get ?...and how much will it cost n what about dvd writers why r they expensive then combo?r they better than combo coz i already have a writer plz suggest me what i should go in for...