My wife had a 58" Whip for her first bow; she was drawing a little less than 27". Very sweet bow. After a couple of years, her draw increased to 28", and the bow didn't behave so well. I draw around 27.5", and found it was not very forgiving at that draw.
Well she loved the bow, and accepted she needed to replace it with another Toelke. Talked to Dan and Jared, and she ended up with another Whip, but 62". Definitely shoots better for her (and me, when I try it now and then). I'd go 62" or 64", as other folks are saying.
Never shot a Chinook, but talked with Dan about one, he told me a 58" Chinook would be about like a 64" Whip.