CPU
i3>a10
GPU
A10>I3
correct?
Correct. If budget is a big constraint you can pair the A105800K with a A55 chipset based mother board for Rs 3750 Theitdepot - Buy MSI FM2-A55M-E33 32GB DDR3 AMD Motherboard online in india
It will beat the crap out of a i3 in gaming without a discreet GPU. For a bit more over the i3 this is a killer combo out of the box.
But if you are planning on a discreet GPU later on get the i3. But even then the A10 being a "physical" Quad Core looks more promising over the i3 with dual physical cores,in the near future.