If you are familiar with private torrent trackers (such as Orpheus or RED), these are the best places for community-verified FLACs. Users upload logs from the ripping software to prove the file is a 1:1 copy of the CD and not a fake.
HDtracks often sells the high-resolution masters of popular rock albums. You can find Arctic Monkeys releases here in 96kHz/24-bit quality, which offers more dynamic range than standard CD quality (44.1kHz/16-bit). arctic monkeys flac
Listening to the band in a lossless format reveals layers of production that are typically flattened in standard digital formats: If you are familiar with private torrent trackers