hi, im looking to buy a dvd rewritter some time pretty soon and was wondering what i should get? i dont relly understand what is meant by dvd-rw+ and dvd-rw-? im familiar with cd rewritters but i think this +/- thing is related to dvd only, what does it mean and which should i get? i dont want to buy a new rewritter to find it gone the way of betamax within a week! oh and also i have seen some advertised as dual layer dvd rewritters? what does that mean? any advice on this would be greatly appreciated, thanks.