Mine is currently on its last leg and I'm also looking to replace it. The cabinet was custom built to handle the exact size of the TV and I'm having trouble finding an exact size replacement. The screen is a standardized 32", but the enclosure is anything but standardized. I might have to construct a new cabinet face to match the new TV.
Replacing the unit is an easy job, but you'll need to make sure that the new TV has the same amount and type of inputs on the back. I'm finding that mine has many more than anything I can find on the market today.....and of course, being six years old, it is out of production so I can get an exact replacement.
As mentioned, if your current unit is a CRT, then get some help pulling it out as it will be heavy and bulky. After that, the rest is a piece of cake.
Good luck
Ron