I asked basically the same question a while back, and I got a different answer from everyone!! It seems that everyone has their favorite, and unfortunately that does not help alot, when your trying to figure out which one you want. I am still trying to decide.
One suggestion, which it seems you have done was to visit each retail store and try them out. Take along types of material you will be sewing with, so you can test them out.
Tomorrow early I am heading out to test the Juki, and Janome and Elna. I thought I had it narrowed down to just 3, but I found the Elna makes one as well. However the top of my list is the Pfaff, so far. Hoping it will come down in price next week at our local retailer as they will be having Christmas in July the last few days of the month.
It is very confusing but you need to get the one that is right for you. Good luck !!