This reminds me of the Bill Moyer's/Joseph Campbell "Power of Myth" interviews from yesteryear. In it Campbell speaks of religion as "software" that we use to run our "hardware". We can run along just fine until we try and mix up our software by dabbling in different myths. At that point we can "mix up our wiring".
For this reason, Campbell didn't really recommend trying out different religions once we're use to "one set of softwares".
From my own experience after leaving the JW's I think it is better to stay within the framework of Christianity if possible. Other religions can help inform but it is better to filter through the "software of Christianity". A person can find Liberal Christianity that isn't that far a stretch from agnostic/atheism even.
My opinion anyway.