Should I buy biosilk silk therapy?

I have aussie 3min miracle, garnier fructis sleek n shine leave in conditioner, and neutrogena triple moisture split end mender. I want to either buy chi silk infusion or biosilk silk therapy. I want my hair to be softer, shinier, and have as little frizz as possible. They both are more on the expensive side, so I really want to know which one I should buy... Thanks!