I'm prety sure he is reffering to the 40inch XBR CRT television that Sony put out about ten years ago. I've never come across even an early generation 40inch plasma tv stand included that came to over 400 pounds. I used to own the 36inch Sony XBR Wega from around the same time as your tv and I read so much about the superiority of CRT versus plasma and LCD. This may have been treue several years ago but when my properly set up and proffesionaly ISF claibrated XBR died last year I purchased a 55inch Toshiba Regza 120hz LED tv that uncalibrated completely smokes my old XBR Wega. It is absolutely no contest.
To replace your behemoth 40 inch CRT, however, with something of comparable picture quality will take more than $300 as the equivilant screen height of a widescreen display compared to a 4:3 CRT you would need soemthing 55 inches or bigger. My 55 inch LED has only a slightly larger viewing area, height wise than my old 36 inch CRT display.