The ED subs would be killer, especially for that price, the only thing you have to worry about is reliability. I wouldn't worry about the drivers so much as I would worry about the amps. However, if and when the amps go, it is a simple matter of replacing those, you can use a lot of different third party amps, but if the driver dies, you are SOL if ED does go belly up. If you are buying new though, you won't get anything close to the performance of two A7s-650s for 1k. Btw, the drivers are far less likely to go awry then the amps.