You have a very nice area... There are generally few or no incentives in my area on Subarus; never have been as they sell too well at their MSRP for the dealers to bother. If you got a 2008 or newer STI for less than $41k OTD around here then you are sleeping with the dealership's owner... :laugh:
Unfortunately I can't find the lists anymore; I'll keep searching and see if I can. The 04 R32 was number 1 on the list for the 04 model year, and the 08 was iirc number 3 or 4 on the 08 list... I know; kinda useless without the actual list, sorry.
Regardless; my point remains the same:
You are correct that STI and Golf R are faster. The Golf R is arguably better; depends on what you are looking for.... It has better performance, marginally better economy, and better tunability; but it lacks several key features that the MKV has that made it such a perfect all around GT car: Auto Lights and wipers, DSG, etc... Not to mention the VR6 vs a 4 Cyl Turbo. The 2.0T is more torquey, peaky, not as smooth, etc. It's great fun but less "grown up" feeling than the VR6 is.
My only point is "better" is subjective depending on what you want. As far as "standing the test of time" the 04 R will always be a classic; the MKV will age better than a Golf R, and the golf R will be more a tuner's car than a GT car... Shoppers looking for luxury will find more of it in a MKV R than a Golf R. Me, I'll be looking to pick up a Golf R as a replacement for my R32 in a couple years...