I tired of delta/sigma DACs years ago. Too edgy, bright, and non-musical.
Ever since it has been a succession of R2R (multibit) and NOS (multibit that is non-oversampling) DACs. All are quite an improvement on the delta-sigmas.
My advice is to start low and slow, Keep it at or under $1K and check out the basic multibit and/or NOS sound, live with it awhile and see how it suits you.
Examples:
- Schitt Bifrost (multibit)
- Schitt Gungnir (multibit)
- Musician Audio Pegasus II (NOS)
- Black Ice FX DAC (NOS)