69 Burb speaker/amp/sub suggestions needed

[Hart_Rod]

I have a RetroSound2 stereo head unit in my burb and am happy with all the features that it offers.

https://www.retromanufacturing.com/p...nt=28568817347

I am currently in the process of finishing the interior and would like to add some decent speakers/amp. What I'm currently planning is four 6.5s, 2 in the kick panel and 2 between the 2nd and 3rd row seat. I also plan on mounting a 10 to 12" sub in the spare tire compartment just behind the 3rd row seat. Thoughts on this setup? Any suggestions to include speaker brands, components or any other recommendations. I haven't bought anything but the head unit, so I'm open for other ideas as long as they don't get outrageous, . I'm just looking for some good sound quality and am not interested in winning any stereo contests, .

Here are some pictures of the rear compartment. Thanks in advance!