Virtually all inserts are set up to make convective heat. Most of them will tell you that a blower is required so as to not overheat the stove. But Pacific Energy is the only brand I know which can be run effectively without a blower and with little risk of damaging the stove, (note attached link).

You can touch the outer shell of most convection type stoves but the top will always be hot, close to 3rd degree.With regard to the arch, some inserts which have slightly arched surrounds, e.g. the Pacific Energy Alderlea T5. I don't think this would be a deal breaker since it is likely that the surround would cover up most of the arch.

Good luck

Here is a link that might be useful: Pacific Energy insert design