i would definitely not buy any dvd writers, standalone or computer, especially not the one you linked to.
the one you linked to is dvd-ram, incompatible with the majority of dvd players and dvd drives.
the reason i wouldn't get any other one either, is because
a.) media is still too expensive
b.) format competition has not died down yet... the two major competitors are dvd-r/rw and dvd+r/rw
once those two issues are resolved, i will probably get one.