just a word to the wise on getting too caught up in dac architectures as a proxy for what a unit sounds like - it is 100% a fool's game
there are r2r dacs that are forward, there are delta sigma dacs that are absolutely pure and musical sounding, there are dacs using both/either methods that sound dull and lifeless
there are so many elements to the design of a lovely sounding dac BEYOND the actual d/a conversion tech within... sooo many
i have 4 wonderful dacs currently, they all present music absolutely beautifully, if somewhat differently - chord m-scaler/hugo tt2 (fpga/solid state), weiss 501 (delta sigma/solid state), audio note kit 4.1 (r2r/tube), mojo mystique v3 (r2r/solid state) --- each handily outperform others with d/s, r2r, fpga engines that i have owned and moved on from
i repeat - you CANNOT and should not conclude what a dac will sound like by just the technology employed for the d/a conversion...