If you're just going to have two controllers with no power blocks, you can just do away with the crossover and have two separate loops, because Bad Things are likely to happen when a train crosses from one loop to the other, even with insulated rail joiners. But if you plan to add power blocks later, you can put in the rail joiners, and eventually you'll need a couple DPDT switches and some wire to create the power blocks. Or, just go DCC and don't worry about wiring blocks.No experience with power blocks, dual control above looks like a good option and will get the plastic rail joiners.
Thanks