Conditioning in carboy and temp

My beer has been sitting in my primary for 2 weeks at 64 degrees +/- 2 degrees. It should be ready for bottling this weekend (I will be taking gravity readings). However I would like to leave it the primary for another week or two for a little more conditioning. Question is should I leave it at the temperature its at now or move it to a warmer place where I can raise the temperature to 72ish?

I leave my fermentors in the space I ferment in. Ambient temperature is 66° to 67°. I typically ferment at 60° to 64°. After about the first two weeks, FG has been reached, I let the temp of the beer rise to ambient.
I had been moving the fermentors upstairs to warm to 68° to 70°. I did not notice any improvement in beers doing this. I also considered the risk of carrying a full 6 gallon glass carboy up the stairs and then back down again at bottling time. Since there was no improvement that I could perceive in the flavor of the beer, the fermentors stay in the cooler brew room.