Focal , Morel, Pioneer, which one is better?

Audible differences between those sets would likely not be significant (except maybe the Pio's if that sensitivity rating is accurate).

W/o a firsthand audition I really don't know a good way to go about deciding that would be much better than flipping a coin.

You can look at a few specs and maybe get a little bit of an idea about what some strengths/weaknesses may be -- for example -- the Pio's sensitivity is the lowest of the 3 -- actually significantly lower.

It also boasts the widest frequency range -- although 32hz can be nothing more than marketing voodoo (there are subs that can't do much that low), and 40+khz is useless unless you're part canine.

Among the 4 I'd probably rank them as Focal 1, Morel 2, JL 3, Pio 4.

If you look up reviews on each and audition them in the stores you will be able to decide what you like out of those choices. I don't think it's right for any of us to spend your money for you.

We don’t know. It all depends on how loud you wanna get, how you want it to sound like, and how much money you have.

A $1,000 system will be loud enough to please most people and your neighbors.

A $3,000 system will be loud enough to be heard from about 1 mile away.

A $6,000 system will be loud enough to get you a noise violation ticket from the police.

A $10,000+ system will be loud enough to win an SPL competition in car audio.

[A] It's any ADVICE not any advise.

[B] ''Better'' is subjective and we all hear differently and have different preferences. It's what sounds better to you that matters. Go someplace where you can audition them in person.

[C] If you are not planning to use a separate amplifier to get the most out of any of these then you're wasting your money.