I've been doing a little google foo and coming up a bit short. I need a whitepaper that details what the SQL max memory should be set at in relation to the total amount of RAM on the server. I ...

You should collect some perfmon counters. Just because you set sql max mem to 60GB doesn't mean it HAS to use it. IE if you have it set to 60GB and your DB is only 40GB. It will never get to 60GB.