Building a system, tell me what you would change!
 

I have a 2015 dc tacoma and the audio is not bad but certainly not up to par.

I'm looking at jbl gto609c for front and rear, which are the 6.5 components.
Either a single jl 10w3v3, or a single sundown sd3 10. Both sealed. Open to other suggestion but my box is limited to 6" mounting depth, 10 inch sub, and .6 cu ft air space.
I'm leaning towards a 5 channel jbl club 4505, Since neither of those subs can handle a lot of power. It'll do 500 watts rms to the sub, and it'll give those 3 ohm speakers about 55 watts rms. (Open to amp suggestions)
My goals for this system are for it to get loud when my windows are down and have good sq when my windows are up. Not looking to change my head unit but will most likely add a graphic equalizer if the sound needs more tweaking.

Backstory, I built the system for my last truck, a single cab tacoma, cost me about 2,000$ in the end, playing regular music depending on the song it did 137-143 db (c-weighted) and 96-99 db (a-weighted) and it sounded perfect, with a 12 band parametric eq. I don't want to spend that much money but I do like to enjoy my music.

Please tell me what you would use instead of those speakers or amp. Not against having multiple amplifiers, it just seemed easier to combine them if it will still get the job done. And my box CANNOT fit an alpine type r, the magnet is to big.