Is Direct tv hi def worth it?

[abynum1]

The direct tv guy just came out to my house to hook up my direct tv. I ordered the hi definition channels,but the satalite is going to have to go somewhere that I really don't want it.

Is there that big of a difference? or should I just go with the regular package?
I mean just how much better is the hi def channels vs their regular counterparts?
The installer is going to come back in the morning in order to let me sleep on it. He said himself that he didn't think the HD package was worth it because they are just duplicate channels of ones you already have and you don't get anything new. Please give me your opinions,I know it'll look better but is it blu-ray vs dvd better, or slightly better?

By the way, the dish won't be sticking out in the front yard,but it will be right up against the back of the house where I'll have to walk around it to get to the porch.
Thanks guys!