I agree that there is a pretty binary "yes/no" choice to be made. However the fit between interviewer and interviewee is hugely variable, and you're never getting away from it. My suggestion for a small team, therefore, is to have a group interview. This probably does not reduce the interviewer/interviewee fit issue, but it does tend to leave people much more in agreement on candidates than when they interview separately, and therefore goes a long ways towards removing arguments over whether certain hires should have happened.
On standardization, there is one gotcha. It is much easier to calibrate a standardized interview process and compare this candidate to that one. However at some point you'll have a candidate who goes through your interview, and blogs the whole interview when they get home. At that point you'll find that every candidate who bothers to do a basic search is curiously well-prepared for your interview - at which point your interview's value drops sharply. At Google's size this happens constantly. For a random startup, not so often. But a hot startup should expect it.
Therefore I would recommend that to the rest of your list you add a monthly calendar entry to see what a search can turn up about your interview process so that you notice when it needs to change.
On standardization, there is one gotcha. It is much easier to calibrate a standardized interview process and compare this candidate to that one. However at some point you'll have a candidate who goes through your interview, and blogs the whole interview when they get home. At that point you'll find that every candidate who bothers to do a basic search is curiously well-prepared for your interview - at which point your interview's value drops sharply. At Google's size this happens constantly. For a random startup, not so often. But a hot startup should expect it.
Therefore I would recommend that to the rest of your list you add a monthly calendar entry to see what a search can turn up about your interview process so that you notice when it needs to change.