Ask yourself one question - how much would it cost to replace yourself in the role you're doing?
If there is market data available, use it. Companies like mercer, etc that conduct industry specific salary surveys are the best, but they cost money to see the data.
A good free website for wage info is here:
http://www.alis.gov.ab.ca/WAGEinfo/C...Page&Page=Home
It doesn't talk about total compensation though, which excludes benefits and other bonuses.
Generally speaking, it sounds to me that you guys are bickering about salary and how much you get out of the business which is a serious problem for the long term viability of the firm. Partner problems sink so many businesses.
If you want a bigger share, buy out some of your partner's equity instead of arguing the value of your day to day services. Which is more valuable in the long run?