Hello @Tate2377 

Thanks for for posting about this!  My take is that it all depends on what you're trying to accomplish with your bike. 

If you're training to increase fitness, you might want to invest in biometric sensors such as a power meter and/or heart rate sensor. 

If you're interested in hauling cargo, you might be more interested in panniers or a trailer. 

If your bike is primarily for commuting, you could look into safety gear like high quality lights and cycling radar systems that warn you of approaching traffic.

We'd love to hear more about your plans for your bike!