Thanks Samson for the answer. That is actually part of my queastion, are some of these models successors to each other 245B => 245B+.
2433 => 2443? (Totally different outlook)
2493 => 2494? (The reslution changes)
Also, are the series in some order like 245Bx => 24x3 => 249x?
What's then the difference between the series? Is it only esthetical or is there some difference in performance?
I kinda like the 2443BW with the height adjusted stand. It has very nice optical specs and is pretty cheap. Also, I don't think it has been replaced by any newer one yet.