I'm not sure how or why you're using the sonos instead of connecting the hard drive to the oppo and connecting the oppo to the primaluna.
I haven't heard the DAC in the 205, but have a 203 and 105D and used to have their headphone amp/dac. They have pretty good DACs. To me they are more "digital" sounding and less detailed than some others.
A MHDT Orchid is a little more than your budget, but will sound less digital and will be detailed and neutral. To me, that would be a nice upgrade. It won't make a night and day difference, but will be easier to listen to and more "natural" sounding.
I have a W4S DAC 2 and it is my least favorite of all the ones I've owned.
Try getting the sonos out of the chain and see how you like the sound. If you still think you might want to upgrade, what do you hope to get from the upgrade?
I haven't heard the DAC in the 205, but have a 203 and 105D and used to have their headphone amp/dac. They have pretty good DACs. To me they are more "digital" sounding and less detailed than some others.
A MHDT Orchid is a little more than your budget, but will sound less digital and will be detailed and neutral. To me, that would be a nice upgrade. It won't make a night and day difference, but will be easier to listen to and more "natural" sounding.
I have a W4S DAC 2 and it is my least favorite of all the ones I've owned.
Try getting the sonos out of the chain and see how you like the sound. If you still think you might want to upgrade, what do you hope to get from the upgrade?