Your forgetting that speed: price is not linear it costs another £300 to have a 4960x that's 200hz faster so an extra ~£400 here for over double the refresh rate quite frankly represents some outstanding value. Ok that was a bit trollylolly.
Thanks for bringing up Alienware I used to have 3x AW2210's and i'm now allergic to TN panels but the branding made them ridiculously easy to sell on ebay, all 3 made £120-140 so I do actually think sometimes its worth investing in that mass market game dominating branding because people forget how tragic they are and just see the 1ms 144hz and think it will be the best thing ever.
And also now you've said it I had a MBP, kept it for a year and the hdd died out of warranty, replaced it and sold it on ebay for more than I payed new! (student discount). Also I had an Alienware after and got loads of cash for that. But my Dell XPS16 that was actually the nuts at the time 720QM + MRHD4670 I could barely give away. I'm backing mindless branding and flip it on ebay it's definitely the best value.
JR