Two reasons I didn't go after a new Evo -
1) they quit putting the Recaros in them - I couldn't go without after driving my friend's Evo X with the Recaros.
2) Insurance. Double my Z and I have no idea why - a 2015 STi was only a tick more expensive (as is my Q50S). The Evo was astronomical. I have a single speeding ticket on my record right now, so I would say I have a fairly average risk factor. I'm also over 25. I can't imagine being a non-homeowner under 25 and getting an insurance quote on that car. It'd probably be more than a payment on the car itself.
I'm hoping you're referring to an RC F-Sport and not an F - if you're in the price range of an RC-F and you're cross-shopping it with an STi and an Evo... you're doing it wrong. You should be cross shopping M4s, ATS-Vs, C-class AMGs, and used GT-Rs at that money.
