How does Aragon 24k/2004 stack up to modern equip?

Fast forward to 2017. I just acquired a 24k sp that replaced a Marsh p2000. The Aragon is giving me the soundstaging I missed with the Marsh. Amp is a ATI 1502. Speakers are Kef iq10's. Really nice!

I too had an Aragon 2004. The sound was really good, clean, with power beyond its competition! The design was also unique. So, I was a happy camper for 5 years. Eventually, however, I went for my next upgrade.

Prior amps after having had receivers by Pioneer, Sansui, Kenwood, and Denon were:
Sony ES, Denon POA 2000, NAD, Adcom 555, Luxman M-02.

I had enjoyable listening experiences with the 2004 which I paired with the following:
B & W Matrix 805 (120w)
B & W Nautilus 805 (120w)
B & W Nautilus 804 (200w), it is at this juncture and out of curiosity that I considered upgrading once more.

With the higher power capacity of the Nautilus 804, I got curious if I still can get more out of the pair by feeding it with a better matched amp. While the Aragon was somewhat comparable sounding to the Luxman I used to have, the Parasound Halo A51 paired with the Parasound C1 Processor and connected via XLRs, just pleasantly surprised me! This I have to share with utmost honesty and sincerity--they simply blew my expectations! When the store I bought them from allowed me to have a 1 week test, I knew it should sound better. But how much better completely floored me!!! It was just another level of listening experience wherein so much more details were heard everywhere!
On familiar recordings, I heard instruments on the highs that I never knew existed and they were really crystal clear, yet sweet!!! Midrange vocals as well as instruments just came much more detailed and alive!!! And the bass was very quick and punchy, deep and well defined, tight and strong!!! All sonic spectrums were simply improved upon! It was a great match for the B & W 804s. 

I do not know how this Parasound Halo set would compare to the current Aragon 8008 or against other excellent makes or models? For sure there are a lot of better set ups with the current plethora of improved high-end stuff. But for now, and with special consideration to my present price point, I am really contented. The law of diminishing returns steps in greatly from hereon.

BTW, other brands I have had the chance to audition were: McIntosh, Conrad-Johnson, Anthem, Rotel, Classe, Audio Research, Proceed, etc.
Other speakers I've owned were: Kef 104.2, B & W 602, JBL 100 monitors, Bose 501 & 601, Pioneer, etc. 

ARAGON - A STATEMENT AND A QUESTION:
I have the Aragon 24K/2004 combo and have used it exclusively since I purchased them new in 88 or 89. I believe I got this gear during a great period for Aragon - as I know they have had many ups and downs over the years. An audiophile I am not. More on the musicphile end of the spectrum. I have switched out other components over the years. After having my system in storage for the last 3 years and no proper listening space for 10 - I finally have it in a decent set up in my small home. I am now on my third pair of speakers since 89/89. First were the B&W matrix 805, then a pair of Wharfdales. Now some on-wall DLS XL's. My speaker quality has been going down and I keep trying to do the best I can - all things considered. 
I have always been happy with the Aragon core of my system in various configuration. I just started streaming with a Sonos and Tidal and am getting a very good soundstage. Soon I'll do the Wyred for Sound upgrade and get an outboard DAC and that will help I am sure. 

I completely agree - it is all so subjective to judge overall. So many variables. I would say my system after all these years still sounds better than what 90% of  people listen to music through. At some point - I will upgrade my speakers to either the ELAC WS 1665 or Vienna Acoustic Waltz (both on wall). But for now and has been my philosophy since I bought this rig - will $5000 of gear deliver $5000 of audio improvement? And if I can get half that level of improvement for $1000 I will do that every time.

And now for my question: 
I am getting a low hum in my speakers from the power amp. I had a dedicated 30 amp circuit installed to no avail. Does anyone know what I should try to fix this? I am thinking a new fuse or a new power cord.

Any advice appreciated.