A question that defines the problem of shopping...

Hi all, I have been using an AR VSi 55 for about 15 years.  My other components are Penaudio Charisma/Chara and a new REL sub.  Rega CD & DAC and a Bluesound for streaming. Cables are all in the $200-$700 range.  I’m thinking I would like to maybe upgrade my integrated amp. I have no stores within 200 miles of my house. How do I even begin looking around for a new integrated that will be a real upgrade from my AR? Of course any suggestions would be great.  Alan