I have a Dell XPS 15 (personal) and Lenovo Thinkpad X1 Carbon (work) in front of me right now. I don't know if there's any difference between the home and business versions of the XPS but if so it's the former. I'm reluctant to recommend Dell because they have shitty quality control and shitty customer service, but if you're looking for the best possible specs in a decent form factor there isn't much competition. Even the new Razer Blade 15 only offers 16GB RAM whereas my two-year-old Dell has 32. The XPS has shitty sound and you'll need an external DAC if you're using it for music but I guess that's true of most laptops.
The Thinkpad is fine, if kind of functional and boring, but has a couple of quirks that really piss me off: firstly the Ctrl key is where the Fn key should be and vice-versa. It makes pressing Shift-Ctrl fiddly and worse, it messes up my muscle memory for when I use any other keyboard. I hate it so much. Also the trackpad (or maybe it's the drivers) is very annoying, there's often a noticeable delay after I start swiping my finger before the pointer actually moves. I know people swear by the nipple (it has one but I don't use it) and I wonder how much that's just because those people are comparing it to a terrible Lenovo trackpad rather than something decent.
No. My XPS has coil whine. It's clear from a cursory web search that this is a common problem and has been for years, but when I contacted them about it they acted as if they had no idea what coil whine was and asked me to send them an audio recording, which I did. They claimed they couldn't hear anything on the recording, and asked me to send them a fucking video, as if that would have helped, and in reply I sent them a bunch of links to other people's videos on YouTube of the exact same problem. So finally they sent someone round, who opened up my laptop...
Before the XPS 15 I had a Razer Blade 14 and loved it. It only lasted 3 years before the battery died but I probably could have replaced the battery easily enough, I just felt like splurging on a new laptop instead. Plan to go back to Razer next time.