If you party with them there is the chance you'll use the power.
I agree with both Johnk and Socketman. If you're not using it you may want to consider a second sub on a differnt upgrade.If you do like loud music (out of room listening, party now and then, etc) you'll be happy with the amp.
I have a 1000-4 and think I've used it to its potential once to date, the one and only time my speakers have sounded strained (crazy loud).