Our old car had +8 spots. I think I used them twice in 10 years. The dipped beam was adequate and main beam fine - with Cibie H180's. The current car seems OK in the dark - better than SWMBO's Mini.
I would save the money and fit uprated bulbs as others have suggested.
Interesting Paul, my car has Cibie headlights with uprated bulbs and Cibie Oscar driving lights, but when driving the Morgan after our daily drivers I must say I find the lighting very inadequate.
I'm currently researching LED alternatives for the headlights and seem to have found some that do not look too modern. I'll post more if I go ahead.