I am in the exact same postion as you. I am about 20k away from level 35 and I should hit that tomorrow. I have a lot of dust and candy and lots of high IV metagame pokemon I can level.
For some weird reasons I keep thinking the next event could be something entirely new like 50% cost to candy and dust for leveling pokemon. I have no reason to believe this but for some reason its holding me back from using all my dust and candy until it is announced when the next event is.