I have just got a new JVC AV28WFR1 and thought that it was just my tv that caused rgb shift. But alas, no... RGB shift is a common problem, and yes you have to fiddle with the service menu, but that's what you have to risk if you want the best setup.

Apart from that the tv is cool, bargain for £480 inc VAT & p&P
> I own a JVC AV-28WFR1EK and the Picture is one of the best I have seen. You
> may have to adjust the geometry in the service menu if you use the RGB for
> Satellite etc. as there is a some RGB Shift. The amount of shift is not
> worth bothering with if you only occasionally use RGB.
>
> The service menu is accessed on the remote by pressing the "i" button and
> mute at the same time, to adjust the geometry select option 4, the other
> options are best left alone. Before you adjust any of the settings be sure
> to write them all down so that you can return them to the defaults if you
> cock-up. You will need to write down the settings for all modes, panoramic,
> regular, 14:9, 16:9, 16:9 subtitle, full. To move between the modes in the
> service menu press the red button on the remote. The up and down buttons on
> the remote moves between the different settings the left and right buttons
> change the value. Press "OK" to save changes or "i" to go back/exit. If you
> change a modes settings save them before moving on to the next mode or the
> settings return to the previous value.
>
> Please note you can completely knacker the TV in the service menu so only
> make the changes if you are prepared to take that risk. The guarantee will
> not cover meddling with geometry etc. in the service menu.
As for toshibas, check reviews in all the mags
empire direct gave me a quote of 3 weeks to deliver my tv, and as it is coming up to xmas, i would try a price match with qed or other places who actually have them in stock. I got them from sound & vision
I'd use the search menu and look at empire direct threads!!!