Microphone Suggestion

what is the application? if it is live vocals, i'd just spend the extra 20 bucks and get a shure sm58.
 
i know that sm58 and 57 is better choice btw i don't have enough cash and want to record some demos/single for my band,if there's any samson q7 user out there please help me out will it get my job done?
 
Well, make up your mind. "Just for demos" and "needs to be studio quality", but an SM58 is "too expensive" is quite contradicting. An SM58 is a perfectly good all-around mic at that price point, either get that or get something that is NOT studio quality, you kind of can't have both.