I would pay the premium but only if the panel is IPS based.
Aimed at professional's what PVA based monitors?
$4000 for a LED PVA based LCD! dont make me laugh, is that some kind of sick joke.
The germans have the XL30 listed at 3600 euro, thats $5300 now put that into perspective.
I agree about the IPS panel part, that is why I am not looking to purchase that monitor but am looking more closely at the Dell, the rumoured LG monitor and waiting to see whether a new Apple is announced in the coming weeks.
I haven't looked that deeply into the specs of the XL30 in a while now but as far as I remember it was more aimed at the professional market and even came with a calibration device. My apologies if that isn't the case.
Also you can't always just directly convert prices. Here in England we end up paying a lot more for our stuff than you lot do! For example a Dell 3007WFP-HC would cost around £870 (~$1720) here whereas on dell.com it is $1,189.00 (~£600). A Samsung 305T £950 (~$1875) whereas just had a quick look on pricegrabber.com and it gives me a best price of $1193 (~£575). On that link you gave they have a 305T on a German site for 1146 euros which works out around £850 or $1690.