This decision needs to be revisited periodically as circumstances will change. The good news is that the amounts accumulate so if you get derailed by an emergency you may be able to catch up later.
Also see if you can get a smaller income tax pay check deduction for regular RRSP contributions. Helps the cash flow a lot. 
 I have not been able to find out what the actual effective tax rate is on RRSP's as the data from taxpayers final return is not known to the public.  I suspect that many folks pay a very high rate of tax on RRSP's /RIF's having the misfortune to die early. For that reason having a million dollar RRSP makes no sense to me. Better to shovel the assets into places that are more tax friendly.