Pretty much says it in the title. After hours of researching basically it says I need an amp and a DAC for the Beyer Dynamic DT 990s Pro 250. I'm going to be playing from my desktop and the FiiO comes bundled with the DT 990s for 200. I know the classic setups of the Magni and Modi or the E09k with the E17k, sadly I'm not sure if it's needed to buy a system that's worth more than the actual headphones if the E11 can deliver if it's only 250 ohms.
Thank you all in advance for the help :)