Neumann makes the best ones. I don't own a U-87 but I use them if they are supplied. Best mike I've ever used. Siemens makes some excellent ones but they are expensive. There's a Siemens mike that has a bunch of diaphragms in them that can be arranged in just about any configuration. I forgot which model it is but it's super nice and super expensive. I'd buy one if I could afford one. Sennheiser is great and that's what I use to mike bass. I've used the Electro-Voice RE-20 which is superb for bass frequencies but I don't own one unfortunately. AKG is also very good. I prefer to Shure but I also use Shure.

And you should always carry cheap, little, throwaway mics--Radioshack and like that. Sometimes, it's all you need and you don't have to lug this expensive gear around. In one case, I was doing live sound for a big band and the drummer would talk to the audience in between numbers. So I gave him a cheap, shitty mike to talk through. No point to hooking up an expensive one just for that. I had to pull the fader down though when the band started playing or everything would bleed through that mike and ruin the sound.