Define a good tweeter? Really depends on what YOUR ears enjoy.
I like the MB Quart titanium dome stuff because I view it as crisp... Others think they are too crisp and are ear bleeders.
Bullets are not my thing at all.
Most people find a good silk tweeter the way to go.
2007 Cadillac DTS: AT400.1 + 15" Brahma
Daughters 2003 Saab 9-3: In progress!
1979 Porsche SC: Kenwood X-994, PG M50, PG RSd comps.
1971 Chevy C-10: wind noise