Good upgrade even without changing springs but if budget allows do both emulator and springs.
I'm about your weight (maybe a few pies extra these days) and I believe I have 0.85 springs in with the emulators and its very good. Without the emulators it didn't dive but was a bit harsh over bumps.
Your step by step for emulator install is correct.
I used Silkolene pro fst 10w which is recommended according to the viscosity charts thingy, that and yorkie chris said get it so I did
