I'll chime in with the Shimano guys, but add to it Daiwa Lexa, Procyon, Ballistic. While I've got experiences with the Stradic FI (love 'em), and Lexa (super impressed, love it as well), I don't with the Procyon and Ballistic. But as I've grown to appreciate some of Daiwa's features, I'd love to try a higher-end model. I definitely like Daiwa's bail system over Shimano's at this point. More positive feel to the Daiwa. But I'll know in another year if that holds up. One of my Stradic's bail system has gotten a bit wonky, needs to be serviced.
Before I bought my Stradics, I did look into the Quantums, but Shimano won the day then. Not sure they'd win over Daiwa today.