What's your budget? I would get a Topping or SMSL DAC/AMP stack if you want something affordable and capable. As for amps, I would look at GSX Mini (1750-1950 USD), or a Burson Audio Soloist. I would recommend Shiit stuff too but I have yet to read reviews where people use Schiit stuff.One final thing, yes in the future these may need a better DAC/Amp, but funds are limited right now, but you know this hobby I am already looking So for my source I use my IPhone to stream Tidal, how would I connect my Iphone as a lot of these amps do not have a USB connection, and my apologies if this is a basic question.
Abyss likes the Topping D90/A90 stack (giving it a solid B in one of their videos).