[B-R-Z]

I'm looking to get a 4 channel amplifier to power new speakers in the dash and rear. The amp I'm looking at is (RMS) 75x4 @ 4 ohm or 125x4 @ 2 ohm. I've read that finding speakers to fit in the dash can be hard. Can anyone recommend speakers that can handle my amps power output and fit in the dash without too much modifications?

For the rear, any 3.5" will fit?

I plan to not use the door speakers at all.

Thanks