The facelift/LCi i8 Coupe & roadster is a much better car than the original, in many tiny ways... and prices are soft at £60-£65k right now.
Buy from BMW, with a £1000 annual warranty & £35 per month service plan to enjoy 50mpg & all the performance you'd likely wish for in a car that'll comfortably do 500+ miles a day.
& yes, I'm biased!
Will