Problems with the IFI Zen Stream.. What's a better Alternative?

@dbb, I suggest you not give up and schedule an appointment with your ISP to check your Internet equipment, etc.

I was also having streaming issues so I recently had my ISP check all my devices, signal performance, frequency in range, etc. He replaced my inside connector/cables, replaced the connectors at my outside distribution cable box and the connectors at the cable box outside my home. He performed speed tests at each point (inside modem, cable box outside home and distribution box at the street) to ensure everything was working. I suggest you schedule an appointment with your ISP to check everything including your router and modem.

BTW, I have issues with routers dropping packets and having other issues that corrupted the cable signal. I suggest you get everything checked before you replace any equipment. I hope this helps. 

During one ISP visit, he deterred my cable signal was out of its normal range so he adjusted it.  

@j_andrews  I'll look into the Innuos PulseMini. I already have a high quality DAC so I would like to avoid paying for something I don't need. Still, sometimes you have to pay more to get what you need. Thanks for your input.

@hgeifman At my summer location, I have upgraded the modem and router to no effect. Your suggestion is well taken on bringing in the IPS tech for a home visit. They will charge me but less than buying a new piece of equipment.

@dbb, I pay my ISP a fee for cable service so my visit was included. As I said, your router and modem may be okay but your cable signal frequency may be out of range. Mine was so a home visit is suggested. Some of my cable connectors were not tight so he replaced them. 

Totally agree with hgeifman, I was a AT&T tech for 40 years, recently retired. You could have the best modem or router inside,  but you have no idea how fragile the outside infrastructure is. Especially if you are still on copper cable.  There is so many connection points between your router and the central office that can fail slowly over time, you would not believe . 

Don't  trust the test that are ran remotely from some office when you call in to complain,  let them send someone out to test the sync at your router, and if there is a issue work their way back to the source.