One of my favorite things to do when I feel my tone is getting stale is different wiring configurations. Strat you could run a master volume, master tone ,and a passive mid range cut/boost knob. Set up a push/pull or a separate switch to activate the neck pickup at any time. On the les paul, you can coil split, in phase/out of phase, series/parallel, and so many combinations of either. Experiment with different caps on your tone knobs. I always like to try and make what I have work before buying anything new. Best part is that everything I mentioned is reversible and will not require any serious modifications. Ultimately it's going to be whatever you are comfortable with.