Sorry I think I might have come across wrong then, I did'y mean anything by it bud. I love the cup spoiler and TBH you may aswel save the extra £££ bteween a £300+ Gen Cup one and the one you bought. As you have said even a rubbish finish can be sorted with good prep so I don't think you have much to worry about. I too prefer the flatter one but it would be hard to get hold of an original one from the sound of it!
I would think about doing it in anthracite to match the alloys and decals would look good if not wrapped in CF, but thats just my opinion lol