Hi , In your price range, I would recommend a Schiit Bifrost Uber Analog . It’s an earlier version lacking Multibit . The Uber version will ad a usb out , giving you a choice to switch between 3 different sources . I has a pair of RCA outs. This will also allow you to use a passive or single input pre , unless you want phono . I just saw one sell on EBay for $250. That was used but like new . It’s the perfect starting point . The Multibit upgrade is available and if you want to go long term you can spend the $250, for it . I run a crap Windows 7 laptop to one with a Cardas Clear cable and the sound is exceptional. I recently switched it out for a Yiggy , but I think so highly of it I’m going to keep it . As far as the different usb gen’s , I’ve yet to have a problem with any of them . Also consider that you’ll need an upgraded power cord at $80-100 and if you get a DAC with a wall wart you’re gonna end up buying an upgraded power supply . So get something that takes a detachable cord , so WHEN you move on you can keep the cord . Happy Listening , Mike B.