I got mine from Ebay a while ago for 90€, but you need to be careful there because there are several cheap copies out there.
They make an incredible difference at night - which is a safety aspect for me. Additionally, they draw just half of the current.
But due to the price - I would only change the headlights if you often drive in the dark.
What I do recommend is changing all other light bulbs to LED. I got mine from
ClassicCarLEDsLast year I had a fatal rear axle fault - and the hazard lights were hardly visible on a sunny day. With the LEDs and the correct flasher module, they can be seen even in bright sunshine.
And when you step on the brakes at night - a look in the rear mirror makes you think you just left the red-light district.
