Question about macbook air?

I'm looking to buy a new 2013 macbook air for school and I was wondering if I upgraded the processor from a 1.3 gigahertz( turbo boost to about 2.6 gigahertz) I think to a 1.7 gigahertz (turbo boosted to 3.3 gigahertz) and upgraded the ram from 4 gigs to 8 gigs and standard 4mb cache if it would breeze though applications and processes that I would need for completing work and possibly play games such as battlefield at a decent fps.It comes with an Intel HD 5000 graphics card, and I've read its actually pretty good.I do understand for the same money I could get a macbook pro retina, but I like the size, battery life, and the solid state drive of the air.