Neither of those subs will really excel with over 1000w. So, if that's what you are looking for, start looking elsewhere. The Rl-p will deal well with anything 1kw or under. I've got 800w on mine in a sealed box, and I'm not even sure I'm pushing it to it's limits yet.
Though, I don't understand what the hang up on power is. I'd take a sub with 800w on it and great SQ and output over a sub that needs more power than that for comparable performance. Does it really matter how much power you run, as long as it sounds how you want?