Also look at Phillips 130% H4's as well as the Osram to replace the headlamp bulbs. Got mine on-line from Power Bulbs (discount codes abound). Also swapped the sidelights for Phillips Blue Vision at the same time for a whiter light.
I looked at swapping the DRL bulbs but it's an odd fitment and there isn't much about at present. You could go for LEDs however I believe they are not currently legal though of course you'll have three years grace until the first MOT ;-) Then there is the CANBUS issue as well potentially throwing an error message. Let us know if you track down any error free ones.
Regards Bob
I looked at swapping the DRL bulbs but it's an odd fitment and there isn't much about at present. You could go for LEDs however I believe they are not currently legal though of course you'll have three years grace until the first MOT ;-) Then there is the CANBUS issue as well potentially throwing an error message. Let us know if you track down any error free ones.
Regards Bob