I dare you to buy enough ships to name them after every single member of Serenity's crew.
noobship: US.S. Malcolm Reynolds
Constellation class: U.S.S. Zoe Washburne
Escort: U.S.S. Jayne Cobb
Cruiser: U.S.S. Derrial Book
Science: U.S.S. River Tam (I have this ship)
Only leaves 3 more for the main crew, so that would be the next tier
But I havent gotten that high yet lol