As for the Focus RS, GTI, STI, Golf R discussion, there are so many pros and cons that flaming or argument about who the clear winner is really is a waste of time.
For me personally, the Golf R with a $700 ECU re-map from APR will essentially give me a 2016 Audi RS3 in power, interior design, all wheel drive, handling, etc. The Golf R is an S3 in almost every way except it's cheaper and has slightly less WHP at purchase (an easy fix with a software change. APR stage 1 will give you 50-70 HP more)
The Focus RS sounds awesome! I found the STI Exciting, thrilling, edgy and fun. The interior was cheap, the head room was small. I'm 6'3" so the RS felt tiny for me and the sound wasn't that great and it was zippy but off the line, meh.
The RS will improve a lot of those things. The STI is more of a GTI competitor. RS should compete with the Golf R. We'll see once reviewers have a chance to put the two against each other on a track and on a mountain-road.
WRX & WRX STI are both great cars. STI has an aging engine and needs more RPMs before the turbo spools and the fuel economy isn't great. The WRX is cheaper and has a lot of modern advantages.
I still think that Subaru, Ford are cars purchased by 'teenagers' or boys at heart. Yes, there are grown men and women who are petrol-heads driving STIs but when I drive my MK6 Golf R, other R & GTI and Audi S/RS people wave, are friendly and never 'rev' their engines. Guys in Mitsubishis, STIs and Focus cars (and Scion BRZ to a lesser extent) are always trying to race me.