The headphone suggestion is the best one. I work very late at night (1-2AM) and my headphones keep me going and motivated to stay up. I usually start the phones around 9PM.
I can recommend 3 headphones that are top if the heap. A few days ago, I bought the RAAL SR1a for the second time. This phone is the most 2-channel like of the 3 and maybe of all headphones. It is called an earphone and not a headphone due to the way it is placed on your head.
- The RAAL CA-1a is a killer phone for the price (under $2k)
- The RAAL 1995 Immanis is considered amongst the very phones, but it is $10k.
- The RAAL SR1a or SR1b is a mini 2-channel system on your ears. I never should have sold it in the first place and have corrected that mistake (and made some profit)
Your MAC integrated amp will drive the CA-1a and the SR1a well. The Immanis may not be a good match if the amp is too powerful. RAAL has the TI-1b adapter that will interface with the MAC integrated.