Just ordered a set of EVOX-R's from Retrofitlab c/w ballasts, and wiring to match my existing halogen set up.
Have ordered a set of Osram Xenarc nightbreaker lasers bulbs to match (from UK).
For anyone who is interested, UK costs are as follows:
EvoX-R's retrofit kit, inc wiring, splitters and ballasts, etc £209 inc shipping.
Import tax on the above £52
Osram Xenarc bulbs £85
Hope to have these in a few days, and will report back on the improvements.
There are lots of options for cheaper bulbs, but these new Osrams seem to get excellent reviews, as do the Philips ones.