lpg 25nfa are great! but for around $80 though. great top end extension. if you have to spend $50, never heard them before but the new seas neos tweets are the flavor right now for diy budget tweeters.
each tweeter mentioned here has gotten great reviews, especially for the money. as i said i've only used the lpg's so i can't comment on the others. go to diymobileaudio.com for more info on these particular tweets.
Like I said, you can try pretty much any tweet you want from Madisound for the cost of return shipping.
Do you really want our diplomatic advice, or do you just want us to tell you what to buy? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif