Id have to agree with Paul that live vocal mics and studio mics are two different animals.

Trying to use anything like a Rode NT1 or any type of tube mic live would be a ....well unpleasent experience they are pretty fragile and usually to hot and will feedback.

The Shure SM58 is the good old stage standard....I like the Shure SM87(not the beta) and the EV 737... they work best for me for live stuff.

Gear is one of those things that just takes years to accumulate.... well I guess the right gear for you.

But if you are starting to get a home studio together. Its totally cool to start off using a "live" mic to record vocals. Later on down the road if you "hear" the mic you want... It will almost be a no brainer.

Best of Luck
Oh Sorry One more Mic to throw in there the Shure SM 7 its not tube but used in quite a few recordings. I dont know if Id use it live.... but just one more to try out when you can.