ok its worth spending the money on really nice screens- you will use them a lot more than you think. in fact mics should ALWAYS be used with windscreens, even indoors. There are a few exceptions, but they are all studio based- not live recording based. Think about it- you've got smoke in venues, air conditioning, fans, and the possability of your mics getting knocked to the ground-- all things that windscreens can possibly save you from. Especially smoke- windscreens will save your mics from smoke better than just about anything other than not bringing them into bars and clubs.