That said, Aerospoke? Brakeless on the street? What are you doing?
Buy an awesome bicycle, and spend as much money as you want on it. Remember, though, that bicycles are effectively free, and that only brake pads, chains, and tires cost money.
Buy fenders. Buy a rat-tail fender and some zip ties and just hide the thing in your bag most of the time if you really have to, but freaking own one and have it ready.
Put a brake on any bicycle that will be used on the street. You can attach a rod-actuated spoon brake and never use it if you want, but you absolutely need to have _something_ [better than a shoe] that is specifically intended to stop you in an emergency.
I ride anything, and I've ridden almost everything. I agree that a fixed-wheel bicycle is possibly the best transportation method available, anywhere. If you live in the rockies, fit a disc brake and some mountain bike tires - it'll still be the best.
That said, if you don't have a fender, you just won't ride in the rain. That sucks.
If you don't have a brake, you just won't stop when you need to dodge something lethal. That is also bad.