Find a car stereo for me.

[Miggo]

Everyone that posts here knows more about this than I do. Bought a car, need a stereo for it instead of the one that's there. Only requirements is a CD/MP3 CD player, and to keep the price around $150 or less. Ease of use is a plus. Wife's car, so if it were easy for me to switch the stations without needing an engineering degree, would be another plus. Thanks in advance for helping me out.