the i5 is the same chip as what is in the MBP 13" and to be quite honest it feel sluggish in comparison to the i7 mini... i'd say get the i7 as you will never be able to do that upgrade yourself. and then upgrade ram and sad yourself and save some $$$ there.
most people don't buy a new PC every year, and so the upgrade meaning that the machine will last you an extra year is worth it. plus. mini really keep value well, and the resell on the i7 will definitely be higher than on the i5 so you'll recoup some of the initial $$$ there
most people don't buy a new PC every year, and so the upgrade meaning that the machine will last you an extra year is worth it. plus. mini really keep value well, and the resell on the i7 will definitely be higher than on the i5 so you'll recoup some of the initial $$$ there