This is my 35iS which I have upgraded with a few select mods which I think make it better than factory.
Bought the car at 18k miles, it is now on 27k.
Current mod list
BBS CH-R with MPSS
Stubby
X6 custom tail pipes
Custom sprayed brakes/diffuser/mirror caps
Brodit for phone/MHD app
LED lights
CarPro CQuartz Finest Ceramic Protection
Golf-T mod
Plans for next year or so
Eibach Pro Springs
H&R sway
Wiechers sport strut bar
Camber adjustment arms
Wagners EVO II FMIC
BMS Charge pipe & Intake
AR Design Race Catted DP
Supersprint x-pipe
MHD Stage 1+FMIC
Hawk 5.0 Pads
Braided hoses
Quaife LSD
Upgraded oil cooler
LCI side repeaters
... Then i think it's finished and I can get on and build a Caterham 7