I'd trust one in .416 as a stopping rifle, or in .375 as a client rifle. .458 Lott is a cartridge for hypothetical armored elephants and I want no part of that recoil.
That said, the Kimbers are twice the costs of a basically identical Winchester m70 or Montana Rifle Vantage, and I don't see much difference between the three. Given a choice, I'd probably avoid the barrel band setup in favor of a stud on the stock. It works better with the Rhodesian type slings I use. That would bias me toward the Montana Rifle offerings.
Steyr wants a lot of money for a push feed action. For a dangerous game rifle I would consider it only in a client role due to the action, and then never buy it because I can get a more suitable rifle for less from Winchester or Montana.