Which one is ideal to get first, the case or the sleeve?
It depends.. I got the case the day I got the MBP and put it in straight away. The sleeve I ordered didn't fit (was too big) so sent it back. However, I'm going back to uni tomorrow so will be taking it around in my bag so got another sleeve today (which is actually meant to be for the 12inch MB but it fits perfectly even with my case). Ideally I would get both at the same time, but if for some reason I had to pick between them, I would go for case first unless I was intending to carry it around. If I was at uni when I got it it would be sleeve first. Just get both!