Speaking as a former developer who is now a Development Manager:
The first thing I'd say is that most developers don't understand how most managers spend their time. When I left my last role (Development Manager) one of my senior developers took the position and commented to me a couple of months after taking over that he really had no idea how much stuff I was dealing with that he didn't know about.
You can argue that I could have been communicating it better but generally my experience is that developers really don't want to know and it doesn't make them more productive so I tend not to mention unless they ask.
I spend most of my day doing things which the developers who work for me don't know about but which keeps crap off their desks. When crap does land on their desk it was generally unavoidable (or at least beyond my influence, see below). I think this is why many developers think their manager does nothing or is incompetent - it's because if you're doing your job well and keeping things away from them, by definition they don't know about it and therefore tend to assume it's not happening.
Secondly, every developer who becomes a manager has views on what they're going to do to make things better, but the reality is that as a manager your influence isn't that much greater than as a developer. Generally you can change process to some extent and so on but you're still going to be pushed by unreasonable people (or reasonable people being pushed by other unreasonable people), you're still not going to have the budget for individual offices or those kick ass machines, and you're going to be even more subject to the politics and other bollocks that developers tend to hate.
What may happen is that you may understand that some of the people who were unreasonable actually aren't, that things aren't always how they seem on the ground, but when you try and convey that down to the team you're likely to be seen as part of management...
So if your perception that you're going to be great and no-nonsense is based on what you're going to change and how you're going to speak truth to power then good luck with that but there's a good chance you're kidding yourself.
There are two good reasons to become a manager: because you're interested in it (and it can be interesting and you can make a difference - just not quite as much as you think and you won't get the recognition you deserve) or for the money (and my very well hidden answer to your well hidden question: yes, most managers do earn more than most developers).
But if neither of those appeal, then stay where you are. Seriously, I was happiest as a senior development and if money were no object that's what I'd go back to doing.