If you got 150K on the Mopar belt,I'd stick with that. My '07 doesn't chirp. My '98. 5 chirper was cured with a Gatorback.
I run the Goodyear Gatorback too. Mine has a chirp, but only in the summer when the temps are up and the engine is hot (especially after running with the A/C). My wife's '04 did it all the time and I had the dealer perform the TSB related to this and it took care of the problem.
GoodYear Gatorback belt !!! I would not worry about water pump & the tentioner pulley at this LOW mileage, but it is not a bad idea to have the parts in stock just in case.