My "system" philosophy - trying to balance my system on that subjective "knife edge" highest level intersection of "detail" and "musicality." To me if you are losing any details you are obviously losing part of the music. But, if the detail you are not losing, is not presented musically, that is also shifting ones system off that "knife edge" in a wrong direction.
Certainly there are lots of other qualities/characteristics of a system to consider, but those above are two biggies for me --- assuming you maintain accurate tone and timbre and linearity, excellent attack, sustain and decay, macro- and micro-dynamics, imaging and soundstaging.
Currently my source is Matt Anker custom sacdmods Denon 3930CI
http://www.sacdmods.com/DVD3930.htm ,
go to bottom of page to see mine (with pictures):
"DVD-3930CI Dual ZapFilter Mod- This machine was built at the request of a customer who wanted both the stereo outputs and multichannel front outputs modified with a ZapFilter output stage since Denon runs a mixdown on the stereo outputs. This way the customer can take advantage of the parallel DACs for his stereo listening, and a clean output stage for his multichannel material. The ZapFilters are powered with an external power supply in this setup, but with 12 power lines running through the same umbilical cable, and with both power supplies installed in the same enclosure as the normal 3930 mod. The digital output board has been removed to accommodate the additional XLR outputs, but could be relocated in a different installation. Inquiries are welcome. "
For 2-channel and f l/r of multi-channel, Modwright SWL 9.0 Signature tubed linestage running Bendix 6900s and 1957 Philips metal base GZ34/5AR4, with Modwright capacitor and power supply upgrades,
to Odyssey Mono Extremes power amps (with "Klaus's special boards" at the time), to Polk SDA-SRS2 speakers.
Tel-Wire power cords on Denon source and Modwright linestage, Black Sand Silver Ref MkV on Odyssey power amps and PS Audio Premier power conditioner (for front end components). Power conditioner and power amps are from Oyaide R1 outlets. Speaker cables and 2-channel ICs are Grover SX (non-teflon dielectric with aluminum incorporated).
For recordings, I try to listen to samples and check other listeners' reviews to find the best perfomances of classical pieces and other genre music albums I wish to purchase.
My "retired" B&O turntable apparently has some wires broken in the tonearm which were said to be non-repairable at the time many years ago.
So for recent years tend to go for SACD if available, followed by DVD-A, then CD or DVD-V.
Some few Blu-Ray audio (from 2L as they came paired with the SACD),
but no blue ray player at this point (maybe Modwright-modded Oppo BDP83 in future?)