Sup guys, I've been putting this off but now it's time to put in some work.
In the next few days, I will be purchasing:

MOOG # K500102 & MOOG # K500101 Lower Ball joints
8x NGK (4589) IFR6T-11 Laser Iridium Spark Plug

Should I buy anything else while I'm doing the LBJ's?

Already changed my air filter and will be doing my timing belt/water pump in a few months.
WIll be changing my brake rotors and pads soon as well, just need to find a decently priced oem quality replacement parts (any input?)

 

I'm hearing about the moog ball joints quite a lot. Are these the ones you lubricate?

 

Get the Moog outer tierods also since you will need an alighment after doing the ball joints. Moog Ball Joints are beefier compared to Lexus Oem so your alignment will be off. Just pay the alignment guy a few bucks to throw them in for you . I've never had any problems with any store (Pepboys, Autozone, Advanced Auto) premium rotors and ceramic pads. Just look any sales offered for the best price

 

If you haven't already, upgrade your caster arm bushings. It's the weak or worn caster arm bushings that put extra strain on the ball joints and cause them to fail prematurely.

I've got my car at my indy's shop right now, and will be doing:

Lower Ball Joints (Moog)
Caster Arm Bushings (Figs Poly)
Lower Control Arm Bushings (Figs Poly)
Outer tie rod ends (Moog)
Inner tie rod ends (Moog)

Also doing trans and engine mounts with OEM parts.

I'd rather cry once, buy once, rather than mixing old/worn parts with newer parts, just to wear out the newer ones faster and still not have it ride good as new.