hi, wich of these amps has cleaner power better sq and is louder? and recomend an other one i whant arround 100rms per channel at 4 ohm not over 200 bucks
You shouldn't hear a difference in sound quality between them.
They will all get nearly identically loud.
The JBL & Infinity use literally the same board, and are both owned by Harmon. I would be surprised if there was any difference between them (other than the location of the control knobs/switches) despite the Infinity being rated for 7w more per channel.
The Alpine is rated for 90w per channel I believe.
Using this figure & the rated power of the JBL, the JBL would be about .6db louder. That's small enough that you probably wouldn't even hear a difference.
All in all I would go with the JBL (actually, I have. That's the amplifier(s) I use). I think cosmetically they are the best looking of the bunch, and mine have not had any problems.