also listening to subs in a store will not give you a true feel to what they will be like in a car, when a sub in a shop plays it's also playing the other subs around it, like a passive radiator, making them sound fuller, if you have an idea of what you'd like to run, your best bet is to ask here or listen to them in a car already. i've ran kicker,rf, cerwin vega, shockers, fi, kove, t3 and now DC, which i am a dealer for, and most of them sound the same, because really they all do the same thing.