Bike Computer

Wahoo Bolt.

There's quite an array of bike computers out there. Prices range from under $50 to over $500. A Power meter will cost $700 to over $1000 for a new one which will CONNECT to a bike computer. I'm assuming you mean for outdoors.

A good resource for making equipment decisions is DC Rainmakers site https://www.dcrainmaker.com/

I just bought a Garmin Edge 520 bike computer. it does everything I need an can connect to a power meter if I ever get one.

I had been riding without a bike computer since starting in 2009 but the last 3 years I've had the Garmin 920XT which has the same basic functions as the Edge 520 but that's on my wrist and I wanted something more visibile (easier to read) on my handlebars.

Get something like a Garmin 910XT and you have a multisport watch that can be used as bike computer, running computer, swimming computer and since it does have ANT+, you can connect power meters, cadence meters, etc. to it.

The Garmin 910XT with the full triathlon package is a nice set up. As noted above, you can use it for all three sports. That said, I also have a Garmin 520 that I use on my bike. I like the larger format. With the 910 XT on your wrist, I find it hard to read while running or cycling and you have to position your wrist so you can read it. With the 520 I can read it without ever having to take my hands off the handlebars.

Good luck.