I'm probably one of the youngest owners on here at 20 I've owned my DE for 9 months now, It cost me £1750 with Admiral without mods and with only 2 years no claims, with all mods declared (full exhaust system, splitter/other body mods, induction kit/ few other bits) was £1900 with admiral at still only 2 years no claims. Little late to the party but hopefully this will help others looking.
I found that insurance was a hit and miss kinda, one day I would get quotes around £3500 the next around £2000.