This spring I sold my 2007 CBR 600RR (white/silver) and bought a new 2009 R1 (yellow/blk) - first litre bike after 10 seasons on 600s!!
Got a great deal on the R1 and was able to sell CBR for very close to asking price.
Had this particular CBR for 3 seasons. I used it for commuting to work 25 km one way - city/high way mix.
Sport-toured on a few weekend trips that were each 2,000 km+ long - loaded up with tank and tail bags
Also did several track days - stock suspension, aftermarket controls
So far this year on the R1:
I've commuted - in the heat and in the rain that this season has given us.
Did a 3 day trip to Lake Placid, NY - Vermont - New Hampshire - Quebec 2,200km round-trip
Did 2 track days at Calabogie - stock trim and tires.
So here is my comparison review:
Firstly what you've read about the heat from the R1 exhaust is true. A hot day in stop and go traffic and I need to stand up off the seat when at a complete stop. Not pleasant at all. I need to find a solution to this because it really is that annoying. CBR was never- ever an issue.
I like not having to shift the R1 as much when commuting - I can cruise along at city speeds all day in gear 1-2. Only thing is I need to feather the clutch a bit more on the R1 when moving off from a standstill.
R1 wins for commuting
Sport-touring is a pleasure on both bikes purely in the I-only-have-one-bike-and-its-a-supersport kinda way. CBR was buzzier at certain RPMs. gas consumption was about the same for me. When 6th gear super-slabbing I'd get 20km more per tank on R1. Comfort-wise CBR is easier on the wrists, R1 has a better seat. Draw between the 2
On the track is where I felt the most differences for the obvious reasons.
R1 I almost high sided on cold tires - I learned to be smoother on the throttle after that!!
Such a wickedly smooth motor and I didn't feel the extra weight (at least 30lbs more(?)) of the R1 vs the CBR600 when cornering and braking. Less engine braking effect. The slipper clutch is nice! The steering on the R1 is quite responsive
Note: Im slow and cautious on the track and never on the limit

I was riding pretty much the same pace with the 2 bikes. Again, take this as the limits of the rider and not the bike.
For the track I'd take the R1 - great sound when you open her up (even stock) and I enjoy powering out of corners and parking into them LOL
Not: fairing removal is so much easer on the R1 - pleasure to work on vs the CBR with the snap-in tabs. "Snap" being the operative word. I love rear preload adjustment of R1 (allen key) vs OEM shock of CBR (knuckle breaking stepped collar)
So in summary go for the R1! Seems like the planets have aligned for you to just do it. Geez you don't need me to convince you, right???
In terms of test ride - PM me