Don't buy a legacy. You will regret it. My friend had one (can't rememebr the model #) to push three 10's and the amp quit after about a month. Even from the beginning (though the end came soon), the amp would shut off outta nowhere...and it got plenty of air, so an overheating wasn't the case...
Though the price is attractive, the amps just ****. Listen to those guys. JBL's are great for the money. Plus, they all know what they're talking about.