Engineering @ college + Macbook pros

<p>Hi,
I am a graduate from High School, and I need to move onto college. Iowa St. Does not require any computers therefore they recommend---anyway back to the question.
Which mac is the best for college?
What about weight consideration?
Or using Auto-cad on the mac? How well does that perform? Does anyone actually use advanced software on the 15.4"?
Dells have billions of options that are troublesome for even an engineering student.
(Who'd waste their time?)
I have been over this several times, but more questions keep popping up in my head as I try to problem solve.</p>