I use a reader. The 7D2 has some odd cable bracket system they want you to use to ensure you don't damage the camera when using the hdmi/usb ports. You can ignore that if you use a reader. As a bonus, you don't tie up your camera while you're transferring files.

Keep in mind the 13" MBPs are all dual-core, while the 15" are quad-core. If this is going to be a workhorse laptop, it's something to be well aware of. While I do have a i7 15" MBP, I've never processed a picture on it, so I can't give any feedback on performance in that regard. It's also my first laptop, so I can't compare to anything else.

If you don't have an unlimited budget, keep in mind you can get a deal on a refurb. Apple sells them directly on their website, though they keep moving where they are hidden. Currently there's a link at the bottom of the regular "buy" pages to go to refurb products. Both my iMac and my MBP are refurbs, and I've had no issues. When I was looking, the refurb prices are competitive with comparable PCs.