Best Mid-High End Component Speakers And Other Questions

[Mrdeep]

Finally getting close to getting my sound system upgraded. I have a 10W6 and Slash 6 amp from my old car that I'll install, but the components are just as important. SQ is my objective

For Install ease, I already ordered the plug and play harness from OWC. that should make this install MUCH Easier

A Few Questions:

1. I am planning on a JL C6 set (6.5+tweeter). Would there be a Focal or Morel that you would recommend over those? Any other brand?
   1. Any reason to get the C7? I didn't see anything substantial enough to make the jump. Plus the 6.5" C7 speakers are THICC
2. Any recco on an amp to compliment the slash 6 for the components?
   1. I have an old alpine KTP Power Pack. Would that be sufficient, or should I get something better?
3. Is there any real reason to keep the rear speakers, or is ditching them fine?
4. Is the stock speaker wire sufficient for the upgraded component or is upgrading critical with the speakers I'm getting?
   1. I'll probably end up changing out all the speaker wire since the car is going to be taken apart any ways, but someone else may stumble on this thread one day wanting to know the same thing. like at what level of speaker upgrade does swapping the speaker wires actually make a noticeable difference?
5. I'll also be sound deadening the trunk and doors. anywhere else that you recommend deadening?
   1. Any rattle-prone areas of the car that you've had to reinforce?

Quality over cost and clout is my focus. I think that's all my questions for now. Thanks in advance!

https://www.garmin.com/en-US/p/1759241/