I think that you will find most CRT's are about the same size, no comparison to a TFT unit.
I use a Medion flat screen, and its a superb bit of kit. Due to Medion re-badging I am not certain who the actual manufacturer could be.
The prices of TFT's and CRT's are dropping rapidly of late, so it may pay you to wait a little longer. Some 17" CRT monitors are selling for as low as £45, and that's with a good swap-out warranty.