Theo, in reply I think David's summary is spot on. Plus, IMO you can't really compare a £5k speaker with a £3k one from the same manufacturer, it depends more on the sound you want whether you'll prefer the i or Twenty/FACT sound.
And yes, I did get a deal, but then I've upgraded my Cyrus gear and bought an Onkyo/B&W home cinema system from him in the last 12 months!