I presently own a Mits. 55809 from 2001 that has been an excellent tv, the only service I have done to it besides cleaning has been resodering the conv.board. I have a chance to pick up a 2004 Diamond 65813 model for about $600. I like the idea of a larger screen, built in HD tuner,DVI and 9" guns.The Diamond has also supposedly been calibrated but I have to check into this.Would this be a worthy upgrade? (I have not seen the tv yet). The size of the CRT "box" does not bother me, just looking for the best picture within my budget. Do the 9" guns make a noticeable difference?