Unfortunetly, this thread will not help you choose unless you have already decided on a couple of them and we weigh in on them. There are too many brands out there and too many good and bad opinions out there. Most people go to brands they know and feel good about their purchase. For example, JL Audio...they make great subs without a doubt, but not worth the money when I can show you a sub that hits harder and sounds just as good for half the price. The same with Viper Alarms. I sell them and do a pretty good amount, but they are much more expensive. However, they are nothing special and use much cheaper parts than they used to. That is Directed for you.