4 RFP4815 or 4 PW1577X

which ones would give me better output? going to in either sealed or ported, most likely ported, box. full power going to subs. (buying an amp to match) im looking to hit more then 130db as that is what im hitting now with two p2 12". 

im going with 4 15" because of the looks, and these are not expensive at all. links are here

RFP4815- http://www.woofersetc.com/index.cfm?fuseaction=product.display&Product_ID=2264

PW1577X- http://www.gooddeals18.com/product/PW1577X

thanks for the help guys.

honestly, i can't beleive you're even asking about the pyramid. the fosgates aren't going to be much better than the p2's you already have, as far as power handling and quality. remember, it's much easier to blow a sub in a vented box than a sealed box.

so to answer your question, go with the fosgates. but, IMO, you could take all that money and buy one good quality sub that can probably out do all of those.