I've got a 1998 Avalon with the 7 speaker setup. I replaced the speakers in the doors, and wired a second sub-woofer into the trunk. I hate the factory cd player because if its any colder than 55 degrees it refuses to play a CD. I use the cassette player to listen to my iPod, but it to is starting to not function when cold.

Unless anybody has tips on how to resolve these problems I'm willing to take the next step.
I'm looking to replace the radio, and the amp if need be.
Any suggestions on a radio/amp combinations that are under $250?
Any tips on making the installation as simple as possible?
I apologize for any n00bishness, but I don't have any experience!

I'll post pics when I'm done with the installation.