Where to get advice on a new system build

“I would prefer used equipment.”

A good local dealer can be incredibly helpful in assembling a cohesive system. The trade-off, of course, is a narrower range of options, they can only recommend and sell what they carry. That said, their real value lies in their ability to build a system that aligns with your taste and budget.

Going the used route through platforms like Audiogon or US Audio Mart offers far more variety, but it often requires patience, experimentation, and a fair bit of trial and error before everything comes together with the right synergy. A world of caution, if you’re considering floor standers speakers, shipping via pallet is highly recommended. 

Good luck in your journey. 

@lalitk  +1

I would start by doing a survey of local dealers. When you walk in I would first find the owner and introduce yourself and explain what you want to do, and that first you want to find the sonic family you are looking for. So, listen to the best they have. You want a dealer you can relate to and is on your side and carries brands that satisfy your preferences. Unless you are planning on trading a lot of equipment, buying new and holding for a decade or two can be a great way to go. If the hobby is trading equipment... well that is a different hobby than I am good at. 

One thing, the industry has not changed since you were in it. Sonus Faber still sound like Sonus Faber... Wilson like Wilson, Audio Research like Audio Research.  In each category there have been minor improvements. 

Local Audiophiles could be a good way to listen with out buying. Look in facebook local area groups, ask at local audio shops about groups etc.