My NS-10 tweeters blew (my ears are OK). Bit of an accident in the studio, careless me with a feedback loop... The cost of the tweeters seem pretty high and there is a fellow who has some NS-20's for sale and I am wondering what you all think of these? Anyone had any experience contrary to the NS-10? Thanks, and this board has been very good since my joining a couple days ago! Signed, newbie.