Welcome
ED30 Tax is same as GTI £245, manual i think is 193 Co2 and DSG 188 Co2, same J bracket!
Re insurance, my own ins costs below.
£467 for STD ED30 (Currently)
£616 for Stage 1 (Exhaust and re-map) in new year 300bhp.
£689 for Stage 2+ (Exhaust, HPFP, Twintake Filter and Re-map to around 340bhp. (next year sometime)
Those were my quotes, i got agreed with my current insurer (Next year will be likely going with greenlight after I spoke to them as they wil be a little cheaper on the mods i think by around £40.
Good luck with keeping your Ed30 std, almost everyone on here will be egging you onto stg 1 at least