Everything about making beer has levels of perfection. You could store your beer at 60-70. You could store it 90-100. You could store it at 32-33.Dave Warner said: I would think you could get a pretty good lager by storing on a cool (60-70 degree) house for the lagering period.
It will be beer at the end of storage. How much oxidation will occur at the different temperatures? What other chemicals will breakdown or react at the different temperatures?
Lagering in beer making is done at almost freezing. Can you store your beer at 60-70. Yes you can. Will you get the same yeast fallout and cold conditioning as 32, no. It will not lager as good at a higher temperature. Remember, the rule of thumb for rate of reaction is: Rate of reaction is doubled for each 10 degree C increase in temperature.
That said, Reality is Perception, If you like your results with storing you beer at 60-70, don't worry about what others think. Enjoy your beer. But we are always looking for new innovations and we like to try people's beer. Bring it to a brewday for us to try.