I am currently running the Richie/Simon flash, the G2 throttle tamer tube, and the Kev mod between my loom and O2 sensor, it's as good as it's possible to be for now I think. I did get rid of my Kev mod thinking the flash would smooth out the lower end surging on closed loop, still found it a bit surgey really so went back to using the Kev mod as well.
The issue that annoyed me the most was trying to hold a constant low road speed, say at 30 or 40 mph and finding the bike being unhappy and coughing and surging, the Kev mod certainly dulled that right down to the point that I am quite satisfied with that side of the bike's behaviour now.
The reflash that Richie and Simon offer turns A mode into something I could only describe as hyperdrive, the bike tries to lift in the first 4 gears and really shifts some, the rpm restrictions are also gone from 5th and 6th gears, I also had my AIS ( air injection system) shut off as the popping and banging whilst fun for a while with the Akra TI exhaust on got to be a bit of an annoyance really. The rad fan also comes on at a lower temperature, like many others have I felt it waited to long to cut in at times. The top speed of the bike ( if my neck could take it) is now around 164 mph ( real speed not indicated) apparently! up from the real speed of 128mph from the factory ( with restriction on 5th and 6th).
I'm probably going to be looking at a rear shock for my next mod when pennies permit, rather fancy a Ohlins with an orange spring if I can get it.