I'm using DVI but I'm sure you're in the camp that says cables don't make a difference to hifi. I disagree and have tried many a digital cables and music do sound different. Likewise, I use a QED Scart on my TV in the lounge and see improvements. I also use a a spare 'hifi' power cable to feed my Hazro and I see further subtle improvements.
Wife likes the physical look of the Dell more - not PQ.
I don't doubt you see a difference on the Scart as it's analogue, the only place (apart from with long runs on digital) that pricey cables make a difference, better s/n ratio means less noise in the picture, easy as.
Digital cabling is sending 1's and 0's, that's it, now, if you have a REALLY bad quality cable those 1's and 0's may get garbled, but that's where error correction in various line protocols comes in, aha you may say, that means that a better cable would have no errors and be better! Not so fast, these error correction systems are able to ascertain (through clever mathematics) the intended bit; if they can't then you get signal drop-outs rather then PQ degredation. In long runs this is exacerbated and thus a high-quality cable will help here (and only here).
And as for a hifi power cable, remember it's feeding a low-cost Li-Shin power brick...take from that statement what you will.
So to recap: Good quality cables for analogue = good investment (up to a point, and that's considerably less than some of these $7000 per metre cables), good quality cables for digital = good over long distances, no-name brand DVI cable that came with the monitor = fine for the metre or so the digital signal must travel.
At the end of the day though, it's all about how happy we are with purchases, if you feel it makes a difference to your enjoyment who am I to rain on your parade?
