If I were in your position, shooting different films, and wanting to have the developer on hand and ready to go, would stick with ID11/d76 as as developers in liquad form are virtualy all 1 shot use, LC29 at 1/29 is, the other dilutions can be re used, but they won't keep for months mixed, so you always need to mix fresh every film you develop, as for the concentrates keeping, Rodinal/ro9 1 shot will keep for ever, but once mixed must be used within an hour, and I mix to I film.so if you want to go dopwn the liquad concentrate route be prepared to mix before every developing session, and use as a one shot
Richard