1. Garmin
2. Optilabs glasses with reaction lenses
3. Lezyne front light for night rides.
I'm a cheap and cheerful kind of chap in just about every regard, but outside of bike purchases these three are by far the most expensive cycling things I've bought to date.
It's not the cost though, it's the freedom they give my cycling. Exploring new places without the faff of maps, being able to go out in winter safely when the kids are in bed, and being able to see properly
