BIG BORE or small bore shocks?

[Verde]

I have both big and small bore shocks that can be used on my Cat SX that I run indoors in carpet. Currently I'm using small bore but with a mish mash of springs that are not all Schumacher (the front are TC springs). I was therefore thinking of buying a spring tuning set to standardise things, so my question is would you invest in a small or big bore set?