Many units have front 1/8" aux jack but it will look like crap with a wire hanging out of the dash.
/////ALPINE CDE-9872 AM/FM/CD/MP3 $99
/////ALPINE KCE-236B 1/8" jack $15
RCA out for full range or sub volume, high pass crossovers, adj bass & treble frequency. Nice basic high quality deck and the aux input cable plugs in the back.
Kenwood KDC-MP638U $169 (add your own male to male 1/8" cable for rear aux)
AM/FM/CD/WMA/MP3/USB(rear) 3pr RCA, highpass and lowpass outputs, remote, multiple lines of text, etc. Ready for: sirius, XM, bluetooth, changer, iPod, steering wheel control, HD Radio, etc.
Either of these are better options than Dual or JVC. The Kenwood will look and sound better but it is more expensive.