+1 for the 90s models - some of those were astounding. I've played Thumbs, Fortresses and Corvettes from that period (never got my hands on a Streamer though) and all were brilliant examples.
Other than that, a lot of the top end models use really exotic woods and are usually neck thru hence the nasty price tag. If you are after one, and as with any other bass/g*****, try before you buy (and do a bit of hunting for an older model).
It might be worth noting that when testing a few basses a couple of years back, I was scouting the 5ers in the $$ range (Corvettes), and although they were at the 'cheaper' end of the spectrum, they impressed me way more than any of the top end models, especially in the 'bang for buck' department. No pun intended.