At this point in your two rail adventure, seriously spend some time on the "dead rail forum" . RC battery is the way to go IMO.
The biggest mistake I made getting into 2 rail was jumping in with a fist full of cash from selling my #1 scale equipment.
Any wired control system can burn up $$$$$ boards with derailments or other shorting events. Protecting expensive electronics can be an expensive venture in and of it's self. Shipping locos for service with burned out electronics can be another adventure.
Bells, whistles, flashing lights and an array of sounds can be like glitzy girls, attractive but high maintenance.
It took years to sell off my errors. Take your time. Hide your check book and cards. Listen to consumers, not sellers.
