The JL W6's have been discontinued for a while but JL still has them in stock as a special order or as a replacement. The JL W3's are basically the replacement for the W6. Go with 2 JL 12W3D4's at $159.99 each and the best amp out there would be the JL 500/1 500 watt mono block subwoofer amp. I'm running the 250/1 to a 10W3 and it pounds like crazy...you can check them out at
www.jlaudio.com On the 500/1 you are looking at $499.00. Check to see if there is a Tweeter store near you to pick them up...let me know what you find out.
Maximadave