I personally like JL, PPI flat piston, Kicker. If you really wanted something for more bang for your buck try MTX's Thunder8000. They kick pretty damn good. If you are wanting the best then you need to buy the Cerwin Vega Stroker or the Orion STroker Killer. I think you can't get much better.

Crazy Contour Guy
1995 Contour SE (ATX)
Alpine 7863
MTX Thunder4250D Amp.
2 pairs of PolkAudio EX 572A's
MTX 2-way X-over network
3 10' BlueThunders
4 ga. Streetwires power wire kit
Esoteric zero-noise RCA's
Streetwires power block
Xenon Super Plasma White Headlight and fog light bulbs
Blue mood interior lights
KKM airfilter
9 mm Motorsport Racing Plug wires