Digital tv converter coupons -- good reasons to get one

I requested two $40 digital converter coupons! Why not? Well, receiving the coupons cost me nothing. I have cable, but it would be nice to have at least one DTV converter box. There are some channels that you can only get over the air, but one very specific reason why I decided to go for these coupons is this: I have a portable DVD player with AV-in. Sometimes I go on vacation to a place where there is not TV. It is nice to check the weather and the new every once in a while Sometimes I bring a All-in-Wonder box and connect it to my computer. But they I can't use the laptop. It looks like for not too much I can get myself a nice little digital converter that would just do the job!