In the next few months, I am thinking about upgrading the speakers and amplification since I just changed out the head unit to a really nice model. I have a bit of experience with car audio speakers, but wanted to hear other opinions and experiences.
I plan on getting a nice set of 6.5" components for the front, ones that have an acceptable depth, but also have sufficient frequency range and power handling. I plan on upgrading the subwoofer to the Alpine SWR-T10 shallow mount subwoofer. I know some modification of the box will be necessary, but I don't see the point of upgrading the woofer to another 8 inch model. I will be putting it in a sealed box, because I am looking for tight bass, not booming.

I will be using an Alpine PDX5 amplifier, which is 75x4RMS and 300x1RMS (5 channel). It is rated very high and is quite compact. It is also under rated in terms of its power. After reading a lot about it, it seems that many have seen 100+ RMS for the front 4 channels, and 400+ RMS to the woofer on the fifth channel.

Here are my thoughts on the components...unless I am going to increase the size of the rear speakers..I might not even use any. Most competition systems don't use rear speakers. Our cabin is very small, and my car is already sound deadened. I might designate all 4 channels to the components. Here are the components I am looking at.
For budget and to keep all components by Alpine:
Alpine Type-R Components

Without budget in mind:
DLS Gothia 6.3

Morel Supremo 6

Focal Utopia Be Kit No. 7

Rainbow CS 260.30 Reference Line

Any opinions on these speaker options??