Help with Centurion boat purchase

I had a thread a little while back where I was talked out of a jet boat (THANK YOU, THANK YOU).
I have now decided on a Centurion but need some help with the difference in models.
I have been on CenturionCrew.Com but I find better feedback on this site (good info in the forum though).
Looking on this site http://www.oodle.com/vehicle/boat/-/make_centurion/ the pricing is all over the board (12K to 50K), same with ebay and onlyinboard.com. I cannot seem to find a used/new price check anywhere (like nada) and I like to have some kind of base line.
I have read about the KK repo issue on CenturionCrew.Com (http://www.centurioncrew.com/boat-repo-deals-0hrs-b-t1672.html&hl=repo), but other than that can anyone help with the different models and changes since 2002?
Any year/model to stay away from?

I am looking to stay in the 21ft range and we are mostly wakesurfers with a little wakeboarding.
I do not need all of the bells and whistles but the following will be necessary (with the boat or added after);
Perfect Pass system (or something similar)
Built-in ballast system (3 tanks, RL-RR&C)
Depth gauge
Skier heaters
Cup holders
Wake plate (hydro)
Wakesurfing friendly exhaust system
Rear swim platform
Built-in anchor (front preferred)
V-Drive (no direct drive)
Trailer