Adam, my sweet, You can have my bottom end when I've sorted the new one out, wont be yet though!
Honestly, I'd rather have a tuned, peaky and fun 1.6 than a standard or mildy tweaked 2.0. Modifiying is all about innovation and making something to suit your tastes afterall. If I were in your shoes dude I'd seriously wait until mine is back so you can have a drive. Ben will be able to give you a quote as the tooling and processes have all been done so timescales like I've had wouldn't be a massive issue.
As for insurance, it's an induction kit with a standalone ECU. Headwork and cams are irrelevant TBH as I really doubt any isurance companie will strip the engine down.
Have a pop in mine and then make your mind up as it's a lot of money but if it's anything like I imagine it'll be worth it.....