Valved systems are like two systems in one and offer the best of both worlds. Once you have a valved system it's hard to go back.
I recommend a system that uses vacuum controlled valves (like IPE, Kreissieg, etc.) instead of electric valves so you don't have to replace them
Also, the standard, non-F1 system from IPE has a superior x pipe design that doesn't impede flow like the F1 x pipe.