End of Life and End of Support are 2 different dates. Your 2019 date is correct.
The reason for the 205 vs the 103 is all about future proofing your network. What I am proposing is that you are getting the 205 at the same cost as the 105. The 205 has more RAM, faster CPU, and supports 802.11ac which will serve you well into the future. The tradeoff obvisouly is cost comparing the 103. Either AP will work but I'd recommend the IAP version no matter what hardware you choose. With that choice out of the factory, you have more flexibility to run with or without the controller.