suspension question

[Goya20]

i have H&R lowering springs for my 325 and i was wondering should i go with bilstein shocks or kyb. and wat diameter i need for my car.

[austra]

i have kyb stock replacements very nice ride for a racecar. could go on long trips no problem. better ride then my 5.0 mustang with coil overs. i will go to the bilsteins at some point. i have the spece30 h&r racing springs

[N2MYE30]

I have billies with my h&r's and I think they are great but I have no comarison to the kybs.