All great choices. When you get that high into speaker lines, the difference between them is minimal compared to what you do with them. There are too many good companies, pick who you want to give your money to and support, and do it.
What are you wanting to use the sub for? Fart burping? Daily street beating? Bass Race?
Open your wallet up and see how much money you'd like to spend //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif