Big bores on a hyper 7

[rich67]

Are big bores worth putting on a hyper 7? I have 13mm shocks at the mo but have bent a shaft (3.5mm) so was wondering if its worth upgrading. Have seen some hobao ones (not sure of size) on the bay for arond £30 front and rear, would these be a good buy? If not which other brands are worth looking at? Cheers

P.S. If I upgrade should I use a lighter or heavier oil than I am using in the 13mm ones?