The secret with laptops is treat them with respect... don't yank the lid open at the corner and break the hinges, don't wrestle the power plug into and out of the socket etc etc.
Can't comment on the Dell, I have an Acer, it's been ace, 3.5 years old, several hours use a day.
Your specs are fine, virtually any modern laptop will do what you ask, but... musician... for sound recording I would perhaps look at one of the portable (or full size) digital recorders that record onto flash memory (SD cards etc). You can then just pop the card into the laptop to transfer and copy the files, just as with a camera and piccys.
This kind of thing, all sorts of models available,
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Oh yes... invest in a good backup program (Acronis) and use a decent security package that doesn't hit resources too much. MSE is excellent,