New iPad for university?

keep your iPad

you don't need an iPad for the course you're doing, but you can sure benefit from having one.
All the serious work (PS, AutoCad, Inventor, SolidWorks, etc) you will be doing on your MacbookPro, all the sketching you will do on paper (if you are serious about your work, forget drawing on the iPad) so the best use for the iPad is as a referencing, scheduling & general productivity tool.
Get a case that allows for a paper notebook as well : Booqpad or Moleskine . This way, you can draw freely on paper and have the iPad close by as a reference (websites, bookmarks, product photos, etc). You will also have good access to your schedule, mails & calendar (i recommend the Producteev app for tracking projects), and you will also find the iPad handy to take notes (on apps like Evernote, Pages).
Since you already have an iPad , plus the fact that this workflow would shift towards noting down stuff & browsing and away from producing things with it, i'd keep the current iPad. The money you save could go towards getting an external monitor for your macbook, which will sure come in handy when in any design software.
Hope this helps. This is what i do anyway (architect).

Good luck

I went to Brunel and studied Industrial Design with education and graduated back in '94. We didn't really use Mac's back then and the Internet was just a bit of weird geeky fun (I used to connect with guys in the US Navy). I now teach PD in Cyprus and we are just getting the staff into using the iPads. Great tool for taking notes, but on a design course, I can't help but think a sketch book/ note pad might still be best. Best of all those ones with lined on one side and blank on the other! Quite often you think of ideas as you go through and want to sketch them out quickly, then catch up with notes. iPhone for carrying in the back pocket and keeping connected, MacBook for doing the actual work. Sorted. Good luck and I hope it is as much fun now as it was back then!