opinions on sub options

I would suggest the two type r's and put them in a sealed box built to alpine specs. The quality of sound is awsome and the box is not big at all plus it will slam. Don't forget you can also sell your current set-up for money to fund your new system. The PDX amps got great reviews from every mag I've read but don't limit your options to just one brand. I hope this helps you but in the end your the one that has to be satisfied not us, If you like the way the ones you installed sound, get them.