thanks for your feedback xera. I can confirm that you are right on the money.
I have been reading none stop since yesterday morning, and I have learned a couple of things. Display Port & DVI (dual link) are indeed the "safe bet". However, there are ways of getting your screen to run at 2560x1440 through HDMI.
Has to be at least HDMI 1.4, and Im reading reports of guys doing it online with a bit of tweaking. All laptops, no desktops here coz that all straight forward...
The downside? You are limited to 55Hz refresh rate. Its a bandwidth issue essentially. HDMI was created commercially for TV's, 1920x1080 and do support 1920x1200 natively, but to say that they cannot do higher is incorrect. Hence my investigation into this topic, in hope of helping other people
@vicv
I called around for about an hour yesterday, looking for retailers/suppliers that have a 2560x1440 screen that I could come plug into, no one had. I have had some success, however, with Wootware who are in Somerset West. Im taking a drive there tomorrow over lunch time to test. Will see how it goes and report back here.