Yamaha CS80

Help me decide to keep my Yamaha CS-50. Im considering getting the  
midi retrofit and keeping it forever...............but

All this talk here about chips blowing up on CS-60 and CS-80 leads me  
to believe that perhaps Yamaha got it wrong in the engineering of  
these two models
 From the posts here the track record seems as bad as the Roland Juno  
106 voice chip--the question I ask is it all worth it if each time you  
turn on the machine
you worry about a chip failure?

On the other hand the CS-50 does not seem as flawed in the engineering  
side as the CS-60 or CS-80 looking at the posts
Have I got this right about the CS-50 ? Its not an engineering failure  
like the CS-60 and CS-80

thanks in advance
David

http://www.myspace.com/jointhecarcrashset