here is a video of the lower control arm replacement that I did.
The ball joints on my car were fine, so i left them as is

you will want to replace both sides: driver and passenger...
the ride is so much smoother, huge difference! The front end feels like a new car.
you will need to get a wheel alignment.

I used Moog parts for the control arm

driver: moog-rk640290
Amazon.com: MOOG RK640290 Control Arm: Automotive

passenger: moog-rk640289
Amazon.com: MOOG RK640289 Control Arm: Automotive

(if you use the links above, it'll help me out at no cost to you)