In reality max bhp is not at the quoted peak power rpm, most peak between 6800 and 7400 rpm
It really depends on what max bhp you want, 350 - blower cams or zzp stage 2 cams, 400 - zzp stage 3 cams, above that then NA stage 3 cams
A wild card is some cat cams ... http://www.catcams.co.uk/acatalog/copy_of_copy_of_copy_of_Full_Profile_Listing.html
4603114 (stage 3 NA) or 4603115 (stage 4), I am running the 4603251 (stage 5) in mine