Personally I feel they should have Xenons and ACC as standard on a £25k car.
Sunroof: I always spec'ed it in previous cars, hardly ever used it and they always rattled or caused extra wind noise. But I agree it brightens up a dark interior.
Yes, the front/rear parking sensors are a godsend especially in our mad work car park. Bloody pillars everywhere.
For me, the single most important option I spec'ed, which is near impossible to retro-fit, is ACC.