Best Under Brace / Tie Bar & Strut Bar for CL9

Hi Guys,

Does anyone using "under brace" on their CL9? are they worth it? I would like to know your thoughts/review (especially for those who is currently using it)

I was thinking of getting the brace below
- Front Under Brace 4 point Cusco Version 2
- Rear Under Brace 4 point Ultra Racing
- Side Bar 8 point Ultra Racing
- Tower bar/ strut bar? not sure what to get (preferably that has no issues / modification to install)

my questions for the above:
1. which brand is good
2. what is the clearance & how low do they sit?
3. any pros & cons
4. where to buy & how much does it cost?

thanks heaps :)