Just finished my cheap and easy 2004 Sahara stereo install. It was done on a limited budget (under $400). I am very pleased with this install. For the price, it sounds very good to me. A very crisp and clean sound with a nice hint of bass. Plenty of power. I was able to use the existing sub in the console for my bass. Here is my set-up.
Headunit – Alpine CDE-102 CD Receiver
Front Speakers –Polk Audio db 461p 4"x6" Plate 2-way Speakers
Rollbar Speakers – Polk Audio db 521 5-1/4" 2-way Speakers
Amp - Alpine KTP-445 Head Unit Power Pack 45W x 4 Car Amp