Help with crossover points

So I really like my tweeters at 2.5k but then they have a really bad "ssssssizzle" ifykwim. Which may or may not be called beaming, I'm not sure. But when I lower 10k on my eq it helps but also lowers the Soundstage which doesn't do a whole lot good. If I cross them over at 6.3k it removes this issue however I don't like the low Soundstage. So what do yall recommend?
Go to site called xsim it is a simulator that designs custom covers. Easy to use but might have to research a little to input speaker parameters. Ohms use multi meter if you have one and guess on ones you can't find. Use high quality parts and that should solve some of the nasty tweeter sound. Just get a low xover cheap tweeter and you should be fine too. SB Acoustics has some very good inexpensive tweeters for sure! Good luck. Michael