I've never heard the infinity, but i ordered the Dayton 10" after reading good experiences with it on this forum. i was nervous about buying something i had never heard before, but it arrived today and i have to say that for the price it is a very good sub. its probably as good as a $250-300 sub, but above that and you start getting significant improvements. Its very tight and musical and has good output, although if you have a large room you may be left wanting more punch.