If there is one thing you could change in your current system. What would it be?

@simao 

Interesting, I look at this completely opposite from the way you do.

From my point of view, now that I am 72 and have upgraded and stretched to financially afford the system I have built over the last fifty years. Which I researched endlessly, built and  listened to by myself.

I am thankful that I stretched the limit of my financial ability, that I did not hold back and settle for anything less than the very best sound quality. I purchased cheap TP, used cars instead of new, did my own yardwork and household repairs so I could invest in my system. It brings me great joy on a daily basis and stands as an achievement of one of my dreams of a young adult. 

You only live once, and when you get to retirement, you want to be able to look back and say "the time was well spent it... these are my experiences". I am very fortunate to have a very long list of these things, and my audio system is one of them... and it  isn’t made up of Schiit. Well... ok, I have a Schitt DAC in my office system, and a Schitt preamp for burning in cables. But my main system is great.

During the spring my allergies get worse and sometimes my ears get wax buildup. A couple times my doctor noticed excessive wax and had the nurse use a device attached to the water faucet to clean my ear channels. Sounds like a jet engine in my ears... but clear and better reception after. 

The sound volume of the cleaning bothered me. That volume, which must be well over 100db cannot be good for you... even if only for a minute. 

Then it dawned on me... that the device was really only an elaborate water jet. So, when showering, I simple put a little soap in my ears, take the shower head and point it into my ears, parallel the the ear canal. Takes a bit of maneuvering... but you can tell when it is going in. The sound volume is low, and clean ears all the time. 

If there is an excessive buildup, you can drop some  DeBrox Ear Wax Remover before the shower, then rinse when in the shower... Walla, clean ears. 

Nothing... or everything. If I suddenly could afford to double my investment... then I would start research.