New setup

Hi, I am new in the audio world.
My setup is Aurilic Aires G1 connected to a DAC, and the DAC connects to a Marantz Av 7012. My speakers are all Klipsch: Front 8060 and subwoofer and center.
I would thinging to improve the quality of the sound buying an integrated amp, if it is possible. I have been doing some research (my budget is around $5k) my choices were: Accuphase e380; Anthem STR and Mcintosh MA 5300.
Can anyone help me with this decision? Is it worthy?