Audiolab M-DAC and the Rega Brio-R is what i just got for my 2 speaker audio system. The brio-r is great for the phonograph too (input one)
I would stongly recommend both. They are "cheap" (only in the crazy audiophile world) and give you great bang for the buck. Both for a headsetup system and speakers.
A cheaper suggestion would be
DAC: HRT Music Streamer II (if you are are looking for a USB DAC)
AMP: Marantz PM6004 is a great cheap AMP too.
4k LG OLED65G6P, OLED LG 55EF9500 (bedroom) | Receiver Denon AVR-X7200WA
Speakers 7.1: PSB Imagine T2 Towers, PSB Imagine C3 Centre, Imagine S Surround, PSB HD10
HTPC: i7-5960X @ 4.6ghz, DDR4 16gigs, Samsung 950 pro NVme, Intel 750 NVMe 1.2gig X 2, GTX Titan XP (SLI)
Sources: Tivo Bolt, Xbox One S, PlayStation 4 Pro, Logitech Harmony Elite, Samsung UBD-K8500 4K Ultra HD, Xbox One Elite Controller.