I'd rather prefer two studies with 0.05% on the same claim by different scientifists to one study with 0.005%.

I wouldn't. Two studies opens the door to publication bias concerns and muddles the 'replication': rarely do people do a straight replication.

From Nickerson in http://lesswrong.com/lw/g13/against_nhst/

Experiments that are literal replications of previously published experiments are very seldom published - I do not believe I have ever seen one. Others who have done systematic searches for examples of them confirm that they are rare (Mahoney, 1976; Sterling, 1959)....PhD committees generally expect more from dissertations than the replication of someone else's findings. Evidence suggests that manuscripts that report only replication experiments are likely to get negative reactions from journal reviewers and editors alike (Neuliep & Crandall, 1990, 1993)