Lean to the softer side if you aren't going to be tracking the car. Solid bushings should only be last resort and reserved for flat and smooth circuit track car setups only, as a car with these installed will take a royal beating on most public roads. Most solid bushing or overly excessive spring rates cheap-o boy racer coilovers don't come with teeth filling warranty coverage.
1993 Nissan 300ZX Slicktop (Oxford Gray Metallic) 1992 Nissan Skyline GT-R (Gunmetal Gray) - Long Live the Z and Godzirra! - "Love cars. Love people. Love life." - Mr. K.