I'm in the minority here, but I prefer to ride without a computer. I think they have become a crutch in many ways. When I raced, computers were very expensive, and I learned from a great coach how to spin without depending on a computer. My legs tell me.

I no longer race, but I love to ride my bike. Not having a computer allows me to enjoy the ride. Years back when I had a computer I ended up putting tape over it during my ride. That way I could get the mileage and average speed at the end of my ride without getting obsessed about it during my ride.

Just something to consider, otherwise you might miss the world as it goes by.