Maybe I'm just lucky, but the standard headlights on all the recent bikes I've owned (VFR800, TDM900, Varadero, Fazer 1000) have all been excellent.

The 6v one on my Triumph Tiger Cub isn't up to much though! :

£120 sounds a bit steep for headlamp bulbs, but I guess if they make THAT much difference, then perhaps it's worth it.