Those are 400W RMS each. I assume they're 4 ohm, correct? If that's the case, you can use an amp that pushes 400W RMS at 2 ohm, since those have dual voice coils. There are many brands. There is not a special one that'd be the best. As long as you don't go for a crappy brand, you're set. Some people here will tell you one brand, and others will argue about such brand, and recommend something else. To avoid that, I'm not recommending any brand.