For me, the more I practice my bench arch, the less soreness it gives me (except for 1-2RMs, and even then it's not so bad). So I'd predict that with practice you will get less back soreness from bench press.
On the topic of arching, there's more than one way to do it -- some methods being safer than others. You always want your core to be supporting your back, and my suggestion is that tightness around the entire trunk should take precedence over how much of an arch you get. This should minimise soreness in the erectors and protect the spine.