Well done on choosing Hope brakes. I love them. I’ve got tech v2 on my mountain bikes, original e4 on the road bike, wife has tech m4 on her mountain bike and tech x2 on her commuter.
I notice that you’re looking at race levers rather than tech. The race lever actually gives a little more power than the tech evo lever (not sure if that’s still the case with tech 3).
I think x2 would do you 183f/160r but given the only difference is the caliper and it’s only a few grams, why not fit the 4 pots? (unless you’re really gram counting). Often the difference in quotes weights is that some are quoted with braided hose and some with plastic.
I would say go big with the brakes. The only thing that’s put me off the v4 is that pads from aftermarket suppliers seem thin on the ground.