i have infinity kappa 6 1/2" components in the front of my gen. I, and infinity reference 3-way 6x9's in the back. personally, i think they sound phenomenal (running off a RF Punch 400.4 amp, 50RMS, 100max per speaker).
Crutchfield has the kappa 6 1/2" components on clearance for $200, the RF 400.4 amp for $270, and the reference 3-way 6x9's for $150.
anyone that has heard my system has been thoroughly impressed with the sound quality, and my deck isnt even that good ($200 sony Xplod 4000X i think). my $.02
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Jon Kenney's red '89 w/ 240k miles
"modified" cats, Flowmaster mufflers, Grizzly Street Clutch, Grizzly Paw throw-out bearing, 73mm MAF, solid-rod conversion, K&N filter, Eibach Springs, KYB struts, FPS adj. aluminum control arms, 17x7.5 Neeper Synchros, 235/45/ZR17 Toyo Proxes FZ4's, TQ limiters, reinforced subframe mounts, polyurethane bushings, KVR cross-drilled rotors and carbon-fibre pads, police grille, glowing Ford emblem, red interior neons, one phat stereo system