My mate who recommends HDMI said it was good to keep up with the latest technology.
And he's right. If you have to upgrade, get the latest. But again, HDMI is simply a digital interconnection
technology (cable and plug), and has NOTHING to do a monitor using LEDs or not. HDMI was created to simplify connecting DVD players, cable boxes, AND
5.1 surround sound in one
cable to the home theater audio receiver or big screen TV (LED, traditional LCD, projector or plasma - it does not matter). HDMI has recently migrated to the computer world as more and more people started using computers in home theater environments, connecting big screens to the graphics card - and using PCs as DVRs. Also it is important to remember that the digital video signal is exactly the same in DVI and HDMI. So the picture quality will be exactly the same regardless if using DVI or HDMI. DVI is video only, doesn't carry audio.
My mate who recommends LED said it has noticeably better picture quality.
That's where the confusion comes in. Better quality than what? LEDs have nothing to do with being better or worse than anything else. I suspect he means LED backlit monitors have a better picture than traditional LCD monitors, which use florescent lights for backlighting. Both types are technically LCDs, BTW, they just use different backlighting.
So just to be clear, you can't compare LED to HDMI, they don't do the same thing. One's a light bulb, the other is a plug for digital signals. Therefore your response time specs mean nothing.
See LED TV vs. LCD TV
. This is about TVs but the same applies to monitors. Note where it says,
Displaying fast moving video is a function of the response time and refresh rate in LCD and LED televisions. The type of backlighting in the TV has no effect on the reproduction of fast moving video. You will want to compare response times and refresh rates when making a purchase decision.
Bottom line, decide if you want a monitor that uses LED or traditional tube backlighting. Then make sure it supports some sort of digital input (DVI or HDMI). Note that many entry-level LCD monitors only support analog and only have a VGA or D-Sub connector, like CRT monitors. And of course, your graphics card MUST support digital using DVI or HDMI too if you want to take advantage of digital quality graphics.