Brettmcee,
Even if we disregard opinion on sound quality, I don't think you will find any particular amp that a majority of people have actually heard. I bet even the most common and long-lived amps have not been heard by more than 10% of the populace. So, at a starting point, you might want to survey how many people have heard certain candidates. I can offer the NAD 3020, Crown DC 300, Dynaco ST-70, McIntosh 275, and Adcom GFA 555 as sort of serious gear that where somewhat widely experienced (i.e., not including stuff like Bose tabletop models).
Even if we disregard opinion on sound quality, I don't think you will find any particular amp that a majority of people have actually heard. I bet even the most common and long-lived amps have not been heard by more than 10% of the populace. So, at a starting point, you might want to survey how many people have heard certain candidates. I can offer the NAD 3020, Crown DC 300, Dynaco ST-70, McIntosh 275, and Adcom GFA 555 as sort of serious gear that where somewhat widely experienced (i.e., not including stuff like Bose tabletop models).