Lovely photo Damion.
It depends, of course, on the style of shooting you intend to do but Miles is right - the 55mm lens is stunning when you need the 35mm SLR equivalent angle of view of a 35mm lens. They are great, even for individual portraits and as sharp as any lenses I've ever used. A bit slow at f4.5 max - but not a major problem if you shoot outdoors or with 400+ ISO or on a tripod.
The good news is that lenses for the C330 are no too expensive. I love my Rolleiflex but the flexibility of interchangeable lenses on a TLR - especially when the lenses are as good as the Mamiya Sekors available for the C330 - is a real advantage.