Good choice. VW has made strides in reliability over the past few years so I don't think that's going to be nearly the issue some thing.
Ironic but I was faced with the same decision as yourself last month. 2013 STI or 2013 Golf R. The Golf R is the better all around car IMO while the STI felt kind of like a throw back car. Boy racer styling, 1990's styled interior, tin can feel, Japanese garbage paint. I should be taking delivery of my 2013 STI Sport Tech Sedan in a couple of weeks.