Exhaust Manifolds studs or bolts

[ProjectChimaera]

Whilst I've got the heads off need to make a decision about exhaust manifolds. Is it best to use bolts again or did I read that another option is to slot the manifolds and use studs with nuts instead? Also am I looking for stainless? Any help greatly appreciated also any recommended suppliers?

[ProjectChimaera]

Thanks gents, Spaceman that sounds very sensible will almost certainly go with it.I never want to experience getting those sods off ever again with just bolts in!