I recommend Kicker or Rockford Fosgate for clarity for the dollar. MTX is coming up with some good stuff lately. As far as sub amps go, earthquake has some awesome powerhouses for the money. Small package yet huge power. I'd stay away from names like rockwood, sony(Xplod), Jensen, and Profile. Just my 3 cents- I work at circuit city in the car audio department.
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Nick,
'99 Contour, Zetec, ATX (ugh), Light Blue:
Sidemarkers, clear corners, badgeless, custom mesh grille, interior neon lights, CEG stickers, ventvisors, Radar Detector, KKM, no rez, Straight pipe muffler, Focussport wires, Accel super EDIS coil, more to come, No back seat, Lots of Dynamat, Panasonic CQ-DF800U, Kicker equipment: 2 ZR 360's, 1 ZX460, 1 ZR240, 2 Solobaric L7 12's, 1 resolution 6.5" component set, 1 pair of impulse 5x7's; All wiring by Phoenix Gold; DEI Python 1000 ESP Alarm