If it was me and the choice was either Spielberg or Pretoria alloys, it would definitely be the Pretorias, even though they're £180 more expensive than the Spielbergs. IMO, the Pretorias are a much nicer looking wheel than the Spielbergs, but I'd also consider the practicalities of both;
- Spielbergs are diamond cut, and diamond cut alloys are prone to white worm corrosion.
- Diamond cut Spielbergs will be more expensive to refurb than powder coated Pretorias if you're unfortunate enough to kerb them.
- the Pretoria's powder coated finish is much more durable than a diamond cut finish, and will withstand the winter salt / grit much better than the Spielbergs will.
Pretorias all the way.