Yeah, was it Goldfinger? Never liked using my real name online, got to protect myself from those investigative journo's when I run for prime minister.
£360 was just the remap and dyno, no power commander just a direct remap of the ECU. From the research I've done the addition of a power commander wouldn't make a huge difference after being properly remapped.
Remapping the ECU might effect the warranty but not 100%, haven't been able to find mention of it in the manual so might be Ok. Honestly its not something I've considered, especially now my bikes running faster, stronger, smoother and (surprisingly) more economically! Remaps aren't damaging, quite the contrary, NOT doing a remap after removing the CAT can be damaging.
I say do it! Guarantied you won't be disappointed.