do a search in the tech forum.
Pinwheel12 done an in depth report on both single and dual cams it is well worth the effort to find the report and read it.
I am a dual cam person and todays dual cams have a solid back wall you also get level nock travel which you cant get on a single cam duals are faster and with todays duals the noise and hand shock levels are about the same as the single cams.