Toshiba 20AF42 20" TV with FST PURE Flat Screen
The newest 20&quot; Toshiba has improved
I went to Best Buy yesterday and thought I was buying the 20AF42.  I compared the display model 20AF42 to other TV's and thought it was the best deal, even though I was aware of the time lag when switching channels.  So I bought it and took it home.  When I took it out of the box, I immediatlely noticed that the front panel control buttons looked different from the display model.  When I plugged it in, I was pleasantly surprised to find that there was NO lag time when switching channels.  I realize now that this must be Toshiba's brand spanking new attempt at perfecting their 20&quot; pure flat screen.  They definitely succeeded here.  I checked the model number today, and sure enough the box says 20AF43, and not 20AF42.  Although I bet there are stores still selling the 20AF42 as runoff.  I stongly advise to wait for the 20AF43 to arrive in store stock.  Picture and sound is GREAT!  However.... the other reviews were correct.  There IS a low level hum coming from the inside of the unit (not from the speakers, but from the circuitry inside cabinet.)  This is the only reason why I didn't give it 5 stars.  For most people, this probably won't be a problem, especially if you place the TV inside an entertainment center.  The noise comes from the back of the unit, and has the same pitch as one of those flourescent bug zapper machines, but at a very low level.  I only hear it at night when the house is real quiet and when I turn the TV volume way down.  But if you think this will annoy you (as it does for some people who reviewed this product) then I would suggest that you get another brand TV, for it seems as though this problem is inherent in this model, if not in the entire Toshiba flat screen line.