hi, if you are intending to fit a hid kit on the dip, i think it's best to have it on all the time the engine is running. switching from main to dip can leave you in the dark as the bulb etc warms up.

i wired in a relay with the trigger coming from the lighting relay[44] using the blue and white wire to bring the hid on only with the engine running

as for kits to get, i got a h7 slimline with a 5000k / 35w, as it's a car kit i have a spare, i believe it was under �30

do make sure the pattern is 'flat' and propely adjusted! as they can be dazzling

ciao