They are actually releasing an STI type-RA (my friend who works at my dealership told me if I put $1,000 down I could get the single allocation they were getting) but for $55,000 CAD (possibly more), to me it was not worth it. I believe the production model type RA is a full loaded STI plus carbon fiber roof, carbon STI wing, a slight bump to 310HP, cold air intake, high flow exhaust with reprogrammed ECU, light weight BBS wheels. I love my 2011 STI, it's a very good car and handles phenominally with almost no modifications, and I have heard the newer STI's handle even better. But as many have stated here, the 'bang for your buck' is less true. The best bang for your buck would still be the base STI, as it dips into the $40,000 range only slightly and you get a great handling car with a tried and true engine (albeit old tech and needs a refresh) but when I was deciding between the top model STI and the Golf R, the golf is becoming an easy decision with much more comfort, tech and refinement as compared to the raw STI which is behind in the tech and refinement segment for me, as a daily driver. Still driving my 2011 STI and it still puts a huge smile on my face after 122,000 kms, but cannot wait to get into a new golf R next year.
More info on the production STI type RA can be found here for those interested or those who like wasting people's time complaining why the car is a ripoff in their opinion because X, Y or Z
http://www.motorauthority.com/news/1110887_2018-subaru-wrx-sti-type-ra-revealed-with-more-power-less-weight