You don't need to spend anywhere near $400 for a really high end head unit...
I'd highly recommend the Eclipse 3403 ($225 street):
Or the Clarion DXZ635MP ($225 street):
Or the Nakamichi CD40Z ($275 street):
Or the Alpine CDA-7893 ($275 street):
All are great head units and will do a good job running 4 speakers right off of the internal power amplifier. You really can't go wrong with any of these units.
I have a personal bias for the Eclipse units because I like thier outstanding CD sound quality but if the radio tuner is more important to you then my first choice would be the Clarion.
BTW, the Eclipse and Nakamichi have the easiest (and best IMHO) user interfaces - they are very intuitive and easy to use.
Also, all of these units will play MP3's burned to a CD except the Nakamichi which is nice if you are into that. You can fit about 125 average length MP3 songs on a single CD instead of about 20 songs with a regular audio CD.
If you will ever want satellite radio - the Clarion will work with Sirius radio and the Alpine will work with XM radio. The Eclipse and Nakamichi are not satellite radio ready.
As far as reliability is concerned - I'd say that Clarion and Nakamichi are probably tied for first with Eclipse being second and Alpine coming in last.
On security - all models offer detachable face except the Eclipse. The eclipse has an electronic defense system that is registered with Eclipse and ensures the unit cannot ever be used if stolen however.
Installation on any of these units by a qualified dealer should'nt cost you more than $100 including extra parts and labor.
Hope this helps.
eMass
I'd highly recommend the Eclipse 3403 ($225 street):

Or the Clarion DXZ635MP ($225 street):

Or the Nakamichi CD40Z ($275 street):

Or the Alpine CDA-7893 ($275 street):

All are great head units and will do a good job running 4 speakers right off of the internal power amplifier. You really can't go wrong with any of these units.
I have a personal bias for the Eclipse units because I like thier outstanding CD sound quality but if the radio tuner is more important to you then my first choice would be the Clarion.
BTW, the Eclipse and Nakamichi have the easiest (and best IMHO) user interfaces - they are very intuitive and easy to use.
Also, all of these units will play MP3's burned to a CD except the Nakamichi which is nice if you are into that. You can fit about 125 average length MP3 songs on a single CD instead of about 20 songs with a regular audio CD.
If you will ever want satellite radio - the Clarion will work with Sirius radio and the Alpine will work with XM radio. The Eclipse and Nakamichi are not satellite radio ready.
As far as reliability is concerned - I'd say that Clarion and Nakamichi are probably tied for first with Eclipse being second and Alpine coming in last.
On security - all models offer detachable face except the Eclipse. The eclipse has an electronic defense system that is registered with Eclipse and ensures the unit cannot ever be used if stolen however.
Installation on any of these units by a qualified dealer should'nt cost you more than $100 including extra parts and labor.
Hope this helps.
eMass