I think it is a small class. There were 45 in my dd’s class. In the dept graduation students could announce where they were going and fuly 3/4 were going to MS and Google. The others were going to grad school, research positions, other companies, 2 to teach for america. I do know that Pixar has Brown as a target school but I don’t know of anyone going personally.
http://aimeemajor.com/anim/pixarcollege.html
The 5 yr MS students I knew from my dd mentioning working with them were going on to PhD programs. Mine went to PhD from undergrad, was accepted to several in the 10 to 15 rank. I think doing the 5 year might make you a stronger candidate for a PhD. I think that is something to decide after you are there. You can get info for now from the webpages.