Just bought my first headphone, the HD 660S2. Need some amp/dac advice.

Hello! I just bought my first headphone and i need some advice to buy a AMP/DAC.

I made a list of 2 devices but i just want to know if the DL300 is powerfull enough for the HD660S2 300Ohm headphone? So i can save some money.

• FiiO K9 580€ AKM AK4499EX 0,780W@300Ω 2W@32Ω
• SMSL DL300 480€ AK4191+AK4499 - 1W@32Ω