Glyn
Best ( cheapest!
) mod I've found is to go to Halfrauds & acquire a pair of Halfords 50% brighter xenon bulbs ( a H1 and a H3..)
These actually give ( to my eye anyhow ) a better defined & brighter beam than the 100W bulbs I had installed previously.
If you want to really go for it, go to
Ducati designs for the twin headlamp conversion but at $499 plus shipping / import tax & VAT it will be expensive and I don't know if they do a right hand drive ( left dip ) version or if the lamp units are E marked or not.
Cheers
Andy