yeah, I`d cop to use it like a desktop though. I bought the mid 2015 15 inch 16gb i7 Retina MBP a few months ago and love it, I had a 2014 13 in Retina but I needed more than 8gb of ram because I run a lot of Virtual Machines for school. Prior to my 13 inch I had a 2009 MBP that ran like butter and only bought the retina because Best Buy had an open box for the low.Already got AppleCare, and I'm fairly sure I'm going to size up.
A pre-2010 13in Macbook pro with 8GB RAM and 1TB hard rive + the wireless keyboard actually does sound nice,
The good thing about Macs is they hold their value, so you can flip it before you buy another and have 30-40% of the new one paid for.