Have the cheapest M1. It flies and the battery life is stellar. The only downside I would say is it's only 8GB of RAM. If you're doing anything with electron development, it's a no-go. You'll need a minimum of 16GB.

It's an incredible machine though. The perf and battery life remind me of the upgrade I got when switching from a HDD to a SSD for the first time. It changes how I use the device.